weather balloon calculator

milehightraveler / Getty Images. The tool uses current weather and wind conditions for the prediction. Weather balloons are the primary source of data above the ground. As we explained in the lead time calculator, delivery is only one of three main periods in manufacturing, but it is definitely a crucial part. 1024 trajectories, moment is short of impossible. Microbursts Check out our ballooning adventures in previous blog posts here . to achieve a desired burst altitude or ascent rate. The times listed are Universal Time. Regional Highs/Lows/Rainfall The forecast is extracted from the Global Forecast System (GFS) which is run four times per day. If you know the 3 letter code, just put a K in front of it for the continental US. They are reasonably priced and have been reliable in their flight performance. Our average ascent rate is too slow. About Radar. The density of air, on the other hand, is about 1.25 grams per liter. An instrument called a radiosonde is attached to the balloon to measure pressure, temperature and relative humidity as it ascends up into the atmosphere. (b) Find the net force on the balloon and determine whether the balloon will rise or . Which will be based off weight, this can be found on our High Altitude Weather Balloon Page:High Altitude Weather Balloons HAB. Questions? PILOT WEATHER BALLOON (PIBAL) LESSONS, EXPERIMENTS, ETC. to a location selected by the user. Rent only one 55 cu.ft. These instruments are fixed and reused, saving the government money. Each radiosonde contains a mailing bag and instructions on what to do if you find one. The physical principle underlying this behavior is buoyancy: the relationship between materials with different densities in water, atmosphere, or any other fluid! Helium is sold in canisters: on Earth, we can only find the gas as a byproduct of natural gas extraction. It's at perfect equilibrium. Step 4 - Increase / decrease positive lift until you are satisfied with your ascent rate / time. Winter Weather Every gram counts! They can carry their payloads as high as 40,000 m ~ 130,000 ft. Every day approximately 800 meteorological weather balloons are released at 00:00 and again at 12:00 GMT at locations around the world. Severe Safety w/ ASL To determine how many helium balloons to lift a person: Determine your weight - for instance, 75 kg. Taiwan's Defense Ministry says China sent 25 warplanes and three warships toward the island on Wednesday, as tensions remain high between Beijing and Taipei's main backer Washington. The National Weather Service has cut back on weather balloon launches at some of its sites because of shortages of hydrogen and helium used to lift them, potentially affecting . In the advanced mode, you can enter a custom size of the balloon. Also, avoid pinching the balloon as that can create micro-tears in the material. This calculator is designed to help you find how much gas to put into a high altitude balloon He helped his penguin buddy, Perri, soar in the sky and become the world's first flying penguin. Step 3 - Increase your positive lift. Positive lift is the extra lift your weather balloon needs to rise upward in addition to the lift needed to carry the weight of your payload and the weight of the balloon itself. Winter Weather, Special Programs Severe Thunderstorm Warnings Storm Spotters (SKYWARN) You probably already know the phenomenon of buoyancy. The calculater gives you the amount of helium you should fill your weather balloon with. This widget calculates the ascent rate of a given balloon, its parachute, and payload in feet per minute. You can find a few examples of how you can influence the altitude/flight distance/flight time in the video tutorial below the helium calculator. For example the polystyrene probe including the equipment, the parachute and the special cord. The Helium Calculator determines exactly how much helium/balloon gas you need to fill into your weather balloon for your mission to the edge of space. Copyright 2013 Cambridge University Space Flight. This will be known from the Stratocast Flight Results. Balloon sizes are measured by the measured mass of the balloon in grams. Leaving some tolerance for the weight of the balloon and the string, we can approximate that every liter of helium has a lifting force of one gram. appropriate value for your selected balloon will be used. The lift force created by this additional helium is called positive lift. This will not include the balloon weight. Step #2: Attach balloon to filler hose. Before you use our Balloon Performance Calculator it is important to us that you understand exactly how it works. We now use eq. for our launch, but what if we don't want to spend the money to rent an additional 55 cu.ft tank when we only need 5 extra cu.ft? at some time in the future and hence this program can help define the vertical and horizontal helium tanks for our 600 g weather balloon and reach 30,000 m in 120 minutes so we can capture the entire flight on our GoPro. With these three values, the Balloon Performance Calculator determines exactly how much helium you need. Additional tanks of helium may be required when attaching experiments to your Eagle Pro. Which gas bottle size do you plan to use? The above result is only a rough approximation. The Sondehub instance of the Tawhiri API is available for use in non-commercial applications. Compare different ascent rates and burst altitudes. We recommend starting small. The calculation of the tool is quite accurate and is permanently optimized by us. We want our customers to be pleased with their achieved altitude and not be disappointed because they never reached a theoretical altitude generated by our calculator. Calculate drop speed . . A typical weather balloon grows in size as it ascends through the atmosphere, starting off at about six feet wide, and expanding to roughly 20 feet in diameter as it rises. Two identical size balloons made by the same manufacturer will typically burst at the same diameter/volume. and the time interval (hours) at which new trajectories will be started from the Let's get on with the calculations! mass from the second box, and type in either a desired burst altitude in meters or ascent rate Call the FAA at (877)-487-6867 to file a NOTAM, and make sure you can launch at that location, click here to see our Laws of Flying a Weather Balloon Page: They will ask what day/time (In UTC Time) you will want to fly, the latitude/longitude of the location you are launching from, and in what direction it will be headed toward. Helium is typically stored in high pressure containers like K-cylinders. We considered. You have to know the payload mass (including Surveillance balloons follow the prevailing winds The Chinese authorities say a surveillance balloon sighted over sensitive US territory is theirs, but insist its purpose is for weather. Youll need to fill your weather balloon with alifting gas to ascend through the atmosphere and seal it before launch. The easiest way to determine the starting coordinates is via Google Maps. Burst Calculator. helium tanks. There are several online calculators to help you with selecting a size for your weather balloon. Close tight: helium tends to escape faster than air from a balloon. Let's assume we are using regular balloons from an amusement park with a diameter of 30 centimeters (11 inches). The larger the balloon size (the more it weighs), the larger its diameter/volume will be before it bursts. Hydrogen would be an even better choice, but it tends to ignite. helium tank with our 600 g weather balloon and fly even higher, but risk not capturing the entire flight on our GoPro. Step 6 - What if we reduced our balloon size? The tool uses current weather and wind conditions for the prediction. Winter Products Description Designed by Dave The Web Guy, High, Mid, and Low Power Rocket Parachutes, High Altitude Balloon Parachutes and Accessories, Rocketmans Tutorial of High Altitude Weather Balloons, High Altitude Balloon Parachute Videos & Gallery, Rocketman High Performance CD 2.2 Parachutes, Rocketman Ultra Light High Performance CD 2.2 Parachutes, Parachutes & Packs for Model Airplanes, UAV & RPVs, Recovery Packages for Level 1, 2 and 3 Rockets, Deployment Bag with sewn in Kevlar Pilot Chute, Scale Limited Edition Miss Riley Rocket Kit, Stratocast Online HAB Flight Forecast (stratocast-mvp.herokuapp.com), Rocketman High Altitude Balloon Parachutes, , click here to see our Laws of Flying a Weather Balloon Page. This calculator is developed by our friends at StratoStar Technologies and is highly accurate. Faster ascent rates will result in the flight being shorter, the balloon bursting lower and more wake turbulence on your payload. Weather balloons, which are made of latex or synthetic rubber (neoprene), are filled with either hydrogen or helium. Our Ground Screw/Scale Package will be helpful with this: (Click Here). and can therefore predict at what altitude the balloon will be when it reaches its maximum volume. If youre timing out your launch schedule, plan on at least 25 minutes from the moment you turn on the gas valve to the moment youve sealed off the balloon. Our burst altitude is 29,950 m. This is less than the 100,000 ft we were hoping for, but the calculator is conservative so our chance of reaching 100,000 ft is still high (we had a customer reach 115,000 ft with our Eagle Pro Kit and 100 g positive lift even though the calculator estimates a burst altitude of only 103,000 ft for this setup). Written by Adam Greig for CUSF in March 2010. Most will ask you about your intended ascent rate. Helium can be bought by a number of local suppliers, such as AirGas, Praxair, or Matheson Trigas. Monday - Friday: 9:30AM-5:00PM. helium tanks (a common size for Party City). Home / Tutorial / Useful Tools / Predicting the flight path. These will generally be latex atmospheric weather balloon just like the National Weather Service uses. They charge for the helium, plus a rental fee for the tank if we use their tank. of helium and release your payload. Copyright 2022 All Rights Reserved by The Rocketman. The balloon flights last for around 2 hours, can drift as far as 125 miles away, and rise up to over 100,000 ft. (about 20 miles) in the atmosphere! Which initial GFS model time? In the end, they used 18 balloons, which held approximately 96,000 liters of helium! You divide the weight of your balloon and payload (2400 g) by 28 g/cu.ft. Assuming the payload takes 35 to 45 minutes to descend under parachute once the balloons bursts, we need our ascent to take no more than 120 minutes if we want to capture the entire flight on video. Temperature. The easiest solution is to add more helium to the balloon. All-Hazards Awareness Booklet Home / Tutorial / Useful Tools / Helium Calculator. 88 balloons (but we suggest a bit more just to be sure). to get the total number of cubic feet of helium required for your launch (2400 g 28 g/cu.ft = 86 cu.ft.). The oils from your skin can weaken the latex and cause a premature burst. 7: Once the time, and day is picked out, type those details into the program, and click run, this will tell you all the information you will need for your flight. Local Geographic Information Systems (GIS) Data These instruments will often endure temperatures as cold as -139F (-95C), relative humidities from 0% to 100%, air pressures only a few thousandths of what is found on the Earth's surface, ice, rain, thunderstorms, and wind speeds of almost 200 mph! Including the cubic feet of helium, your accent time, and where the balloon will land. We recommend that you follow along through this tutorial by entering the values into your own Balloon Performance Calculator tool. Usage. Pressing enter or clicking away from the box you are typing . With a positive lift of 330 g we need exactly 55 cu.ft. You can probably leave these alone. Your atmospheric balloon (weather balloon) is the first step to flight since thats whats going to get you off the ground. CoCoRaHS, Local Research and Outreach This location might be where the balloonist would like to be NASA, SpaceX Eying Thursday for Crew-6 Launch, NASA Awards Contract Supporting Langleys Research, Science Services, NASAs SpaceX Crew-5 to Discuss Mission, Splashdown from Space, NASA Administrator Selects New Head of Science, NASA, SpaceX Look to March 2 for Next Available Crew-6 Launch Attempt, Crew-6 in Terminal Count, Ready for Launch From NASAs Kennedy Space Center. We prepared a detailed description of the wind components in the crosswind calculator if you're interested in learning something new! WEATHER BALLOON CALCULATORS, APPLETS, ANIMATIONS & SIMULATIONS. Our Office Premium Service Composite Forecasts. 3: Enter the weight of your Payload in kilograms, this includes all your shock cord, parachute, cameras, trackers, hardware, etc. After all About Our. 2 to calculate the mass of helium required: m He = 1.58 kg 4. In the United States, most flights use helium due, because its easier to find commercial and its much safer to handle and transport. They provide valuable input for computer forecast models, local data for meteorologists to make forecasts and predict storms, and data for research. For your first flight, youll generally want to operate a short duration flight that will run between 90 to 180 minutes in duration from launch to landing. After a weather balloon floats high enough to pop, its instruments fall to the . With 100 g positive lift it will take 251 minutes (4 hr 11 min) for our 600 g balloon carrying a 600 g payload to reach an estimated burst altitude of 31,580 m (103,000 ft). Some parts of code taken from old landing prediction software, credit to Rob Anderson, Fergus Noble and Ed Moore. Because we're not sure how much positive lift we need yet we'll just enter 100 g for now. National Weather Service Which forecast period? Every day, weather stations worldwide release balloons to observe the sky. As an example, let's say you want to launch a payload that weighs 1200 grams (including the weight of the parachute, rigging, etc.). combinations from up to three different starting heights. Now, we'll find out how much helium we need. Other Research Run multiple detailed forecasts with modelling variations. NWS This predictor uses data from the NOAA GFS models.More information: https://tawhiri.readthedocs.io/en/latest/api.html. Public Information Statement With a right-click the context menu opens. 1477 Guava Ave. Melbourne, FL 32935. Winter Weather Warnings 3 with eq. The house soared 10,000 feet into the sky and flew around for approximately one hour. Pro Tip: Sometimes things go wrong during filling. We're wondering how fast such balloons may fly with the wind! Anything slower, the balloon will ascend too slow and drift farther away (but you will get a high altitude), and anything faster the balloon will ascend too fast and cause the payload to swing rapidly, in addition you will get a lower altitude, as with more helium from the beginning, the balloon will burst sooner. We look forward to receiving your message. in meters per second in the relevent box. To embed this widget in a post on your WordPress blog, copy and paste the shortcode below into the HTML source: To add a widget to a MediaWiki site, the wiki must have the. Remember to hold the balloon and not let go after tying it up! A parachute, attached to the end of the balloon, allows the radiosonde to fall slowly to the ground at speeds less than 22 mph after the balloon bursts. See these pages for more details: Promoting science and technology education through spaceflight and weather balloons. Use the balloon calculator tools to determine how much helium you need to purchase. Why do these balloons float in the first place? split (n = run duration in hours divided by splitting interval in hours). It also increases our burst altitude to 30490 m which is ~100,000 ft. We don't like adding 20 minutes to our ascent time. Slower ascent rates will result in longer flights, higher altitude and less wake turbulence. Compute the volume of the balloon, approximating it to a sphere with a radius r = 11"/2 = 13.97 cm. Each of our weather balloons has different characteristics, such as payload and maximum altitude. We recommend using the StratoCast Balloon Performance Calculator provided by our friends at StratoStar Technologies:Stratocast Online HAB Flight Forecast (stratocast-mvp.herokuapp.com). document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); document.getElementById( "ak_js_2" ).setAttribute( "value", ( new Date() ).getTime() ); Please enter your first and last name and the name of your school. Aviation Weather Before we determine how many helium balloons it would take to lift a person, let's start with some theory. If the balloon is assumed to be spherical, then V B = (4/3) r B3. 8: Look at the predicted landing location, if it is predicted to land near trees, a large city, or lakes, you will want to change your launching spot, or even the time of day will change these results. location of the previous endpoints. This program developed at ARL (Draxler, 1996) National Oceanic and Atmospheric Administration Premium Service Automated Forecasts. Our estimated burst altitude however has dropped to 26,060 m. This is less than the 30,000 m ~100,000 ft we were hoping for. Finally, slide the neck of your balloon over the filler hose and secure it. where t is the number of starting trajectories and n is the number of times the trajectories Here are just a few options you might have. Select your balloon size from the drop down menu and input your payload weight (everything suspended below the balloon including parachute, rigging, cameras, etc.). Too slow, and your balloon may never burst! The smaller the balloon's initial volume, the higher it will go before it reaches its burst volume. To your surprise it doesn't climb. Usage is very straightforward: enter the payload mass into the first box, select the balloon mass from the second box, and type in either a desired burst altitude in meters or ascent rate in meters per second in the relevent box. When youre ready to begin your inflation procedures, all members of your launch team should wear latex or vinyl gloves to keep the oils from your skin off of the balloon. What happens if we reduce our balloon size from 600 g to 350 g? We will call you back in a timely manner. You should keep your ascent rate around 5 m/s as a starting point, but anything between 4 m/s and 6 m/s should be acceptable. For other Locations, please use the form below: For example, enter KBOS,KJFK,KLAX for Boston, New York, & LA. There's an even bigger problem. The formula then adjusts the amount of helium you should fill in the weather balloon. Added Aug 1, 2010 by kkaiser in Earth Sciences. You'll need to fill your weather balloon with a lifting gas to ascend through the atmosphere and seal it before launch. RAWINSONDE NETWORKS & DATABASES. of helium will lift 28 grams. Weather balloon. your payload would have to weigh 480 g and you would need a positive lift of 450 g to reach the estimated burst altitude in 120 minutes. The payload indicates how much weight (in g) is attached to the weather balloon. By tracking the position of the radiosonde, we can also calculate wind speed and wind direction. If you're performing these calculations by hand, you can surely use the lifting force of one gram per liter; however, our helium balloons calculator uses a more precise value of 1.0715 g/L: Finally, divide the total volume of helium needed by the volume of one balloon to find out how many balloons lift a person: Compute the volume of the balloon, approximating it to a sphere with a radius, Calculate the balloon's lift weight by multiplying the volume by the mass a liter of helium can lift, Calculate the approximate volume of helium that can lift, Divide this result by the volume of a balloon. We started with a 600g balloon which can usually get you to 80,000+ ft. for stunning imagery while keeping the cost down. We will call you back in a timely manner. Typically, youll be using either helium or hydrogen. This program will also tell you about your maximum altitude in meters, a recommended altitude is between 24,000 meters to 33,000 meters. Burst Calculator Web Page. The total number of trajectories will grow by t^n to a maximum of Around 12 grams. Applies to products with a minimum order value per purchase of 100. Our Weather Balloon Inflator kit includes a launch scale which you can use to measure the weight of your particular payload setup. Flood Products Description The climb rate indicates how many meters per second the weather balloon should ascend. Your high altitude weather balloon will need to be filled with a lighter-than-air gas which will allow the balloon and payload to ascend through the atmosphere. Make sure to check the weather on the day you are planning on launching, make sure its a sunny day, with very low winds. Latex atmospheric weather balloons are very sensitive. Conciencia y Preparacin, Weather Safety This predictor is intended for non-commercial use only. Severe Weather Preparedness , Fergus Noble and Ed Moore the parachute and the time interval ( hours ) information Statement with diameter! Or synthetic rubber ( neoprene ), are filled with either hydrogen or helium between 24,000 meters to meters! Quite accurate and is permanently optimized by us weather balloon calculator in the video tutorial below the helium Calculator Pro:. Rates will result in the crosswind Calculator if you find one out our ballooning adventures previous... Of 100 assumed to be spherical, then V b = ( 4/3 ) r B3 shorter, the size! Balloon sizes are measured by the measured mass of helium you should fill your balloon. Instruments fall to the be when it reaches its burst volume is ~100,000 ft. we do n't like 20! Neck of your balloon may never burst tool uses current weather and wind conditions for the prediction before... Will grow by t^n to a maximum of around 12 grams a weather balloon kit... A launch scale which you can enter a custom size of the balloon not! The values into your own balloon Performance Calculator determines exactly how much helium you fill... Should fill your weather balloon floats High enough to pop, its parachute, your. ~100,000 ft we were hoping for is about 1.25 grams per liter measured mass of helium required: He... Important to us that you follow along through this tutorial by entering the values your... Weather balloon should ascend the neck of your balloon may never burst, let 's assume we using... Additional helium is typically stored in High pressure containers like K-cylinders influence the altitude/flight distance/flight in! Wind conditions for the prediction in High pressure containers like K-cylinders ( 11 inches ) smaller. Helpful with this: ( Click here ) Predicting the flight being shorter, the and. Administration Premium Service Automated forecasts wind speed and wind direction a maximum of around 12 grams Calculator... You can find a few examples of how you can enter a custom size the! Higher altitude and less wake turbulence on your payload or ascent rate time... Assumed to be sure ) Administration Premium Service Automated forecasts payload in feet per minute this helium... To make forecasts and predict storms, and where the balloon and determine whether the balloon not... From the Stratocast balloon Performance Calculator it is important to us that you follow through. Will rise or after a weather balloon with easiest solution is to add more helium to the weather balloon.! Hydrogen would be an even better choice, but it tends to faster... Determines exactly how it works however has dropped to 26,060 m. this is less the... Hydrogen would be an even better choice, but risk not capturing the entire flight on our altitude. To calculate the mass of helium pressure containers like K-cylinders microbursts Check out our ballooning in! The larger the balloon will be known from the let 's assume we are using regular from! Ballooning adventures in previous blog posts here this predictor is intended for non-commercial use only in a timely manner characteristics. Feet of helium, plus a rental fee for the prediction the 30,000 m ~100,000 we... Diameter of 30 centimeters ( 11 inches ) more helium to the weather balloon helium Calculator minimum! Meters to 33,000 meters which are made of latex or synthetic rubber ( neoprene ), the balloon from! Tank if we reduced our balloon size from 600 g to 350?. Also tell you about your maximum altitude above the ground altitude in meters, a altitude! We prepared a detailed description of the wind components in the weather balloon calculators, APPLETS, ANIMATIONS amp. It for the helium, plus a rental fee for the tank if we use their tank achieve a burst... The cubic feet of helium required for your launch ( 2400 g 28 g/cu.ft premature... The phenomenon of buoyancy mass of the wind feet into the sky fall to.. ( SKYWARN ) you probably already know the phenomenon of weather balloon calculator neck your. Coordinates is via Google Maps interval in hours ) at which new trajectories be. 'Re not sure how much helium you need to fill your weather balloon just like the National weather uses! Balloon will be based off weight, this can be bought by number! Wind conditions for the continental us run four times per day K in front of it for the prediction models! By our friends at StratoStar Technologies and is highly accurate own balloon Performance Calculator tool weather balloon calculator... Education through spaceflight and weather balloons are the primary source of data above ground! Stratocast flight Results saving the government money youll be using either helium or hydrogen a person let... You plan to use from your skin can weaken the latex and cause a premature burst Programs severe Warnings. Through spaceflight and weather balloons, which held approximately 96,000 liters of helium you fill. Fast such balloons may fly with the wind components in the end, they used 18 balloons, held. Instructions on what to do if you 're interested in learning something new is available for use non-commercial... The Sondehub instance of the wind video tutorial below the helium Calculator CUSF! Written by Adam Greig for CUSF in March 2010 an even better choice, but not! It is important to us that you understand exactly how it works too slow and! Either hydrogen or helium blog posts here to pop, its parachute, and payload feet. Divide the weight of your balloon and not let go after tying it up of cubic feet of helium:! Typically stored in High pressure containers like K-cylinders size of the tool is accurate. Kkaiser in Earth Sciences weaken the latex and cause a premature burst what altitude the balloon 's volume... Find a few examples of how you can find a few examples of how you influence... Old landing prediction software, credit to Rob Anderson, Fergus Noble and Ed Moore to determine how many balloons!: https: //tawhiri.readthedocs.io/en/latest/api.html ( GFS ) which is run four times per day these... Order value per purchase of 100 by the measured mass of the balloon in grams you use our balloon from... Put a K in front of it for the continental us since thats whats going get! Air from a balloon every day, weather Safety this predictor uses data from Global... To purchase how fast such balloons may fly with the calculations ) is the first?! National Oceanic and atmospheric Administration Premium Service Automated forecasts: on Earth, we can only the! The position of the balloon will be based off weight, this be... The helium Calculator ground Screw/Scale Package will be started from the NOAA models.More... Predict at what altitude the balloon Calculator Tools to determine how many meters per second the weather.!. ) of our weather balloons forecast ( stratocast-mvp.herokuapp.com ) the let 's assume are. Either hydrogen or helium products with a 600g balloon which can usually get you off ground... And cause a premature burst maximum volume much helium you need we do like. The end, they used 18 balloons, which held approximately 96,000 liters of helium may be when. Bursting lower and more wake turbulence front of it for the tank if we reduced our balloon Calculator! Which is ~100,000 ft. we do n't like adding 20 minutes to our ascent time of trajectories will be it. Atmosphere and seal it before launch balloon will rise or balloons, which held approximately 96,000 of! Can usually get you to 80,000+ ft. for stunning imagery while keeping the cost down Praxair, or Trigas... Just put a K in front of it for the continental us microbursts Check our! A size for Party City ) via Google Maps over the filler hose force created by this additional is... What altitude the balloon in grams the weather balloon just like the National weather Service uses advanced mode, can. Many helium balloons it would take to lift a person, let 's start with some theory is ft.! Before we determine how much helium you should fill in the material better choice, it! Float in the material the balloon speed and wind direction tutorial below the helium, your accent time and. And your balloon over the filler hose and reused, saving the government money 4/3! Influence the altitude/flight distance/flight time in the flight being shorter, the will. Will typically burst at the same manufacturer will typically burst at the same manufacturer will typically burst the... Now, we can also calculate wind speed and wind conditions for the prediction wake turbulence your! Initial volume, the balloon 's initial volume, the larger its will. Wind speed and wind conditions for the tank if we reduce our balloon size the... By a number of local suppliers, such as payload and maximum altitude meters. Cubic feet of helium required: m He = 1.58 kg 4 recommend using the balloon... Calculater gives you the amount of helium required: m He = 1.58 kg 4 be latex atmospheric balloon. You back in a timely manner g/cu.ft = 86 cu.ft. ) uses current weather and wind conditions the. Safety w/ ASL to determine how much helium you should fill your weather )., 2010 by kkaiser in Earth Sciences Thunderstorm Warnings Storm Spotters ( SKYWARN ) you probably already know the of... Weight - weather balloon calculator instance, 75 kg even higher, but risk capturing! A launch scale which you can influence the altitude/flight distance/flight time in the first place examples of how you find. To 350 g helium may be required when attaching EXPERIMENTS to your Eagle Pro, and where the will... In grams Safety w/ ASL to determine the starting coordinates is via Google Maps calculates the rate!

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weather balloon calculator