High Altitude Balloon Experiments: Part 2

(Continued from part 1 )

My first test was a total success, but I had bigger plans. Happy that I could easily track my balloon from the land, and that the transmitter was powerful enough, I set about designing version 2 of my tracker.

Version 2 had one big improvement: a GPS receiver. Now I'd be able to track it's exact latitude, longitude, and altitude. Other changes included:


The software was a complete rewrite. Broadly it consisted of the following tasks:

On the receiver end, a brand new system was made up which featured:

The software on the receiver emulated a GPS receiver, so as far as the laptop was concerned, it was soaring many kilometers above the earth. This made tracking pretty easy. I spent some quality time with some very powerful fibreglass resin and made up a nice little enclosure for the receiver and stuck it to my car dashboard.

So on the 24th of October I loaded up the car with a tank of helium, an ex-US military weather balloon, all manner of cables, spares, gps receivers, etc and headed off for Methven. The latest High Altitude Balloon Trajectory Forecast had suggested that launching from there would put it down somwhere around Cashmere, although there are so many variables involved that I suspected it would land anywhere but there. However the general wind conditions that it revealed suggested that today was a good time to launch, with relatively little high altitude wind, and the prevailing direction being a NE direction up the island. Pretty much ideal.

I was joined by my trusty driver, another Michael, and while I spent the drive checking off the systems and fixing last minute problems, he got us to Methven.

Here we discovered that the original launch site was currently a rodeo, so we moved to the racecourse around the corner. We found a nice spot and filled the balloon. Two smaller balloons were tied on further down to act as a kind of "parachute", in that they would provide additional drag and boyancy when it fell, slowing its descent.


Mere seconds before the launch I discovered the polyester thread had been sheared through already by the container, so after some quick work with the masking tape and the addition of a backup line, we were ready to go.

DSC_0013   DSC_0017


Unfortunately within seconds the antenna had burst both "parachute" balloons, but there was nothing I could do about it now, it was well beyond reach.

We went back to the car and called up the tracking, where I promptly found a range of bugs in the reciever that caused it to reset after every measurement came in, which made getting a correct reading very difficult. However we did the best we could and soon we could see the little cursor on the map rapidly gaining height and heading off around the edge of Methven.

Within minutes it was at 1km altitude, then 2km, 3, 4, 5. It seemed to be rising at about 1km every 10 minutes, and it was moving fast . We jumped in the car and roared off after it, picking up measurements every 20 minutes or so. It was getting ahead of us and we were facing some long routes. Soon it had crossed the Rakia River and was well on its way towards the Waimak. Unfortunately the Waimak only has two crossings so we had to do some extra miles that it didn't have to.

Measurements here were few and far between as my large Yaggi antenna is too big to be used inside the car, and we didn't have time to stop very often. We traced it to near West Eyreton, and as I was taking the readings I started getting weird readouts. First I thought it said 15km altitude (!!!), but the temperatures were conflicting; the external air temp had gone from -42.3°C, to 9°C. Soon after I stopped getting any readings. What had happened????

While I pondered the options, we headed to it's last known address. Here I did a sweep and picked up nothing, then I did a sweet with the scanner and Yaggi and finally detected the faintest little signal; too weak for the receiver, but enough for the scanner. I waited for the human mode to start and quickly jotted down numbers.

17242173, 89, 40, 20, 4337357, 17242173, and so it repeated.

Stupidly I had left the source code at home so didn't know what order these numbers were in. The latitude and longitude weren't too hard to pick, but I couldn't tell altitude from temp1 and temp2. Whatever the case, none of these numbers were negative.


Hindsight is great and it is obvious looking at an altitude/temperature plot, I wasn't sure whether my probe had landed, or whether it had moved beyond the troposphere and into the stratosphere, where the temperate slowly rises to relatively balmy levels. To compound matters I mis-converted the latitude and longitude and ended up with -42° 27' 25" latitude, and 172° 14' 32" longitude, which placed it on the very edge of the Waimak river. Worried that it would soon float away, we dashed over there.

Recent flooding however gave us some headaches and it took several detours to get back on track.

Uh oh. Receiver module is the bulge on my dashboard.

We soon ended up bumping along some tracks down to the Waimak. We stopped and had a look around: not much to see.


The receiver wasn't picking up anything at all. I theorised that maybe it had floated away, maybe it had drowned, maybe it had drained its batteries.

That night back at HQ I ran some numbers and while scratching my head put 43.37357, 172.42173 into Google Maps. Bingo, it put the last known position of my probe within 500m of where we had last heard from it. Hmm! More frantic number converting and it turns out I'd used the wrong coordinate format. Converting things correctly gave: -43° 22.424", 172° 25.304". Referring to the code I now saw that the last transmissions had been of 89m altitude, 40°C internal temp, and 20°C external temp; all these numbers firmly pointed to it sitting on the ground.


The following morning I roared off towards -43° 22.424", 172° 25.304". An hour later I was spreading gravel as my phone counted down the metres.

700 metres.


I headed down the farmer's driveway and soon saw the wife mowing the lawns. I stopped and explained my mad science experiment, and had she seen any small white objects falling from the sky? No… neither had her son. But she was most happy for me to wander around staring at my phone walking in arbitrary directions.

The distance got smaller and smaller and I was soon getting pretty close. I was now walking straight towards the point where Google Maps said it would be, and at 15m I noticed a small reflection from the middle of a paddock of calves. I let myself in, and by george…


There it was! Completely and utterly dead battery, but it had survived the (calculated) 50km/h descent to earth just fine, with only a bent antenna. The reason I had trouble picking up its final words would be the bent antenna, and the numerous farm buildings and shelter belts between me and it. I was amazed to find it within metres of it's final coordinates; within the limits of accuracy for consumer GPS. My system didn't just work; it worked really well .

DSC_0005 (2)

Now that I had it I quickly set about processing the GPS logs that I'd recorded. A few quick scripts later and I had a pretty good idea of its path:


And a few more scripts later I had a Google Earth visualisation too:


Each vertical white line represents a reading; you can see that once it crossed the Rakaia we didn't get many readings, mainly because we had to spend all our time driving to keep up with it. I was very lucky to get a transmission just before it landed; what I had misinterpreted as 15km was actually 1.5km altitude, and hence the reason the external air temp was above freezing.


The "human format" transmission proved to be a life saver, as it gave me the final resting location. The addition of Kaowool high performance (and heavy) insulation meant the probe never got below freezing point. The Energizer Lithium batteries lasted well, and are very lightweight. The strawberry punnet I used did a great job, although a sealed enclosure would be better. The polyester thread didn't snap once I'd protected it from the sharp edges. And of course, the GPS performed brilliantly.

I was curious what had caused the balloon to burst at 11,142m. I did some research and found that at this altitude, the air pressure is 1/10th that at ground level. This means my weather balloon was ten times the volume, and double the diameter (around 4-6 feet) when it burst.

Many problems and improvements were identified and these are being worked through and fixed as I write this. The receiver is being rebuilt and will be tested a lot more this time, and will have a few fail safe measures added too. I have also acquired a powerful external antenna for my car that should allow me to receive measurements while on the go.

The most exciting addition for version 3 though? A camera!



Friday Feb 22 2019, 3:46am FabianThify (from France) says...
HELLO There is nothing to write about me at all.
Nice to be here and a part of this community.
I really hope Im useful at all

urgences dentaires 92
Friday Feb 15 2019, 6:46pm Jameswrono (from Estonia) says...
Masteron For Powerlifting
Be mindful of the framing of your subject. What this means may vary by subject. For instance, in case you are getting a snapshot of just one individual, receiving a close photo in which the subject fills the structure is your best bet, given that facts are essential. On the flip side, a panorama chance may well make use of getting further aside, as you grow the complete arena in this way.
Testosterone Cypionate Night Sweats
Try and workout every single day if you are having difficulty with anxiety. When you are getting reduce all of your current additional energy you then make your thoughts a little bit more exhausted. This is certainly wonderful when you have sleep problems because of your nervousness. While in workout additionally, you will observe that you aren't thinking of a lot, in order that is great for concerned thoughts too.
Masteron Fat Loss
Fluid and clean-on eyeliners are great for daring, remarkable, and extremely exact collections, but they can be very difficult to handle for those who do not have steady hands and wrists or years of training. Rather, select eyeliners with noticed-tipped applicators. These are much easier to manage and produce a comparably strong and specific series.
Cuanto Primobolan A La Semana
Sunday Feb 3 2019, 1:20am alanaxq18 says...
Big Ass Photos - Free Huge Butt Porn, Big Booty Pics

public teen porn free lesbian porn clips disney porn streamed monster giant tit porn six on one group porn

Thursday Jan 31 2019, 5:33pm Darnellbialf (from The Bahamas) says...
Здравствуйте форумчане!

Советую присмотреться к возможности

Хватит жаловаться на правительство и начальника! Возьми жизнь в свои руки и заработай для свой семьи
используя интернет!Новый проект в котором с небольшой начальной суммы можно решить ряд своих финансовых проблем! Ссылка снизу в подписи!
Monday Jan 28 2019, 3:33pm DeweyOvado (from Uzbekistan) says...
Здравствуйте. Как можно с вами связаться?
Tuesday Jan 22 2019, 11:55pm Lisop (from Belarus) says...
Посоветуйте, желательно плюсонуть более слотов.
Тут и здесь больше инфы: http://stroika-kom.ru/%d0%b1%d0%b5%d0%b7-%d1%80%d1%83%d0%b1%d1%80%d0%b 8%d0%ba%d0%b8/sharks-software-novye-igry-i-sistemy-dlya-klubov.html
Saturday Jan 19 2019, 10:11pm LaurenGic (from Tunisia) says...
temporary email address for verification As a Hawaii Wedding ceremony Photographer and being a Groom myself I've been via the rigors of getting in speak to with suppliers and acquiring promotions from likely wedding firms while planning for a wedding ceremony. Even though I experienced to learn this lesson the hard way, I am providing you this idea so you do not have to. One of the most helpful items of suggestions I can give to any client is to established up a separate momentary e mail account for your wedding preparing and use it to sign up for staying in contact with sellers, contests at bridal expos and every time you are requesting information from a potential seller online.
Friday Jan 18 2019, 11:41am krispl11 says...
Free Porn Galleries - Hot Sex Pictures

porn straems prix gay porn drunk group sex porn girdles pantyhose porn cervix insertion porn

Monday Jan 14 2019, 6:36pm Jamesmah (from Kyrgyzstan) says...
Hello. International free dating service.afamesma.tk
Friday Dec 21 2018, 5:58am shanegi1 says...
Girls of Desire: All babes in one place, crazy, art

porn forum harley raines albino porn thora flash porn 3 way sonic unleashed porn furry porn bridgett blowjob

Monday Dec 17 2018, 12:56am EdwardBig (from Colombia) says...
сильный сексуальный приворот
как можно приворожить мужа


приворот чужого мужа последствия
парень после приворота
приворот на растущую луну на любовь мужчины
через какое время начинает действовать приворот
как узнать что сыну сделан приворот
как приворожить парня черная магия
как определить приворожили ли тебя
приворот на девушку последствия
что чувствует заказчик приворота к жертве
приворот на возврат парня


приворот чтобы муж вернулся
как приворожить парня на секс
вернуть парня с помощью магии
помогите приворожить парня


любовная магия вуду
черное венчание

присушка на мужчину
приворот молодого человека

быстродействующий приворот
черный приворот на любимого

как приворожить девушку магия
приворот на возвращение девушки
если тебя приворожили симптомы
белая магия как вернуть мужа в семью
признаки приворота у женщин и девушек
долго снимается приворот
делали ли приворот
сколько действует приворот и его последствия
приворожить мужчину помощью
как снять с мужа приворот любовницы


как понять что на муже приворот
заклинание на любовь девушки
какие привороты работают
приворот на мужчину последствия для заказчика
как быстро приворожить мужчину без последствия
как приворожить замужнюю женщину
мужа увели приворотом
как можно вернуть любимого человека
приворот чтобы парень вернулся
присушка на любовь
Sunday Dec 16 2018, 4:12am NGHoward (from Portugal) says...
смотреть онлайн порно в хорошем качестве
Monday Dec 3 2018, 8:31pm DetmebNip (from Россия) says...
Детская мебель на заказ в Нижнем Новгороде - http://a2mebel.ru - a2mebel.ru

http://a2mebel.ru - детская комната
Thursday Nov 8 2018, 5:34pm millievy16 says...
Unique home page instead of throw:
Tuesday Nov 6 2018, 5:20am Albertdow (from Mauritius) says...
ссуда кредит займ различие как проверить остаток денег на карте через телефон займ между юр лицами беспроцентный займ на открытие бизнеса как получить льготный кредит на строительство жилья по 13 указу как положить деньги на тинькофф карту вывод денег с киви кошелька на карту альфа банка мтс банк карта деньги вклад в сколько времени переводятся деньги с киви на карту интернет займ на карту срочно оформить заявку на кредит и получить решение нужен займ через систему контакт получить кредит в спб с открытой просрочкой положить деньги на школьную карту через госуслуги как работает карта яндекс деньги

оформление материнского капитала займ онлайн займ где одобряют сколько идут деньги на карту сбербанка из казахстана соглашение возврата займа быстрые займы без отказа переводом контакт Перевел деньги не на ту карту приват как вернуть деньги с мтс на карту сбербанка обратно тинькофф перевод денег на другую карту новые мини займы на карту онлайн с какого тарифа мтс можно перевести деньги на карту

проводки по прощению займа взять займ под кредитное авто кредиты и займы в городе москве займ у частного лица в дубне как узнать кто перечислил деньги на карту сбербанка онлайн 1000 рублей в займы онлайн как ускорить процесс возврата денег на карту мошенники квартиры займ перевод денег с телефона на чужую карту отказы в выдаче микрокредита

карта кукуруза снять деньги без комиссии банкоматы как долго переводятся деньги с альфа банка на карту сбербанка машина в кредите как получить лицензию такси как вернуть деньги на карту в стиме получить кредит в новосибирск займы не являются доходами после внесения денег в карту через сколько времени можно снять микрокредит в хмельницком на взять займ на три месяца срочно займ на карту по телефону сбербанк

вывести деньги с вебмани на карту через обменник займы при плохой кредитной истории и текущими просрочками мгновенное решение по займу на карту как дать займ физическому лицу платиза займ личный кабинет отзывы
Monday Nov 5 2018, 5:57am Changdar (from Yugoslavia) says...
Как получить бесплатно лицензию Minecraft - это вполне реально, полную инструкцию можно скачать тут: https://bit.ly/2OnJ97x

How to get a free license Minecraft-it is quite real, full instructions can be downloaded here: https://bit.ly/2OnJ97x
Tuesday Oct 23 2018, 8:15pm suzanneda18 says...
Right-minded started untrodden protrude:
Saturday Oct 20 2018, 1:22am Xdpfife (from Россия) says...
Пройдите 1 регистрацию, сделайте 2 действия
и получайте от 8950 рублей каждые сутки в автоматическом режиме.

Мы гарантируем:
- Первый заработок в течении 60 минут.
- Стабильный доход 24 часа в сутки.
- Поступление денег без задержек.
- Для России, стран СНГ и Европы.
- Без вложений и установки ПО.
- Специально для новичков и людей без опыта.

Friday Oct 19 2018, 5:25am LinaSlefs (from Россия) says...
Мы платим за лайки! - Оплата сдельная!

Наш сервис предоставляет настоящие лайки на фото заказчиков, которые готовы платить за качество.

Именно для этого мы и набираем удалённых сотрудников, которые будут выполнять работу, то есть ставить лайки и зарабатывать за это деньги.

Чтобы стать нашим удалённым сотрудником и начать ставить лайки, зарабатывая при этом 45 рублей за 1 поставленный лайк,

Вам достаточно просто зарегистрироваться на нашем сервисе.

Ознакомьтесь с правилами и условиями на нашем блоге: > https://optimdoxod.blogspot.com/ <

Вывод заработанных средств ежедневно в течении нескольких минут.
Monday Oct 15 2018, 7:08am Berdarisdek (from Rossija) says...
Как легко похудеть? Массаж точки от лишнего веса
Thursday Oct 11 2018, 7:17pm Termoplenka (from Украина) says...
Всем привет теплоты в ваши дачи!
Вот как раз да и притопали резкого похолодания. Считаю здесь довольно в одиночестве из самых лучших подарков за хозяйтве.
Про Пленка для утепления окон много мифов и споров, но
посудите сами вот http://plenka.buyonline.su/images/shema_okna.jpg
- это простая инструкция для применения Утепление окон своими руками
По параметрам: ширина-1.10 м.,длина-6 м.,пленка- 6.6 кв.м.(хвататет на 3 окна) +рулон двухстороннего прозрачного скотча и главное - низкая цена!
Очень доволен и рекомендую найти обращайтесь:
утепление окон на зиму
(067)-585-58-47, (050)-202-60-72, (093)-984-50-22, alexandr_shevaшабакаukr.net
Могу помочь или подсказать Александр (alexandr_sheva/шабака/mail.ru)
Также предлагаю посмотреть моё новое видео [youtube - ACusjvjqOo8[/youtube -
https://youtu.be/ACusjvjqOo8 - краткая видеоинструкция по наклейке теплосберегающей плёнки на стёкла
Monday Oct 8 2018, 6:40am kolyasRer (from коляски из польши) says...
Всем привет; свежжее обновление полезной информации для родителей rfkzcrb Это лучший выбор для маленьких модниц, модников и их родителей!Туфли девочкам, школа, р.В самый раз для новорожденных.
Tuesday Sep 11 2018, 11:19pm ceceliayh11 says...
Unique about page instead of project:
Friday Sep 7 2018, 10:46pm rachellezx60 says...
New adult blog website
b ondage tube sissy transformation video baby stores online south africa
woman in africa cannabis outdoor seeds women empowerment articles husband in chastity videos mature women who want to fuck train your waist corset unisex baby outfits world popular books
Thursday Aug 30 2018, 8:14am RobertKam (from Syria) says...
Проверенная доска объявлений подробности здесь

давать объявление
Friday Aug 3 2018, 5:02am donxu69 says...
My revitalized folio
download games and apps for free live chat video live wallpaper application fun chat rooms how to make money with android app development
android play google android software upgrade android apps & games mikandi free apps best action rpg android
Thursday Jul 26 2018, 9:49am sharronff60 says...
Contemporary launched porn locality
youtube erotic videos erotic entertainment love erotic erotic star erotic webcomic
Saturday Apr 14 2018, 10:14am twilajb1 says...
Fresh home stage after throw:
Saturday Mar 10 2018, 1:52am RodgerVax (from Liberia) says...
A new micro-chip possesses a large have an effect on even if you all reap the rewards and also non-winner here in internet poker online video. The technique that you have fun playing the hands and wrists can also be that are of value, yet, it is the micro-chip commonly known as their RNG (Accidental Quantity Machine) which gives an opportunity for your personal game player to treat that advanced playing or possibly botch the likelihood. To spell out, consider the electronic poker via internet piece of equipment as an effective Laptop or computer. It`d be advisable to complete due to the fact that maybe what you'll find it. Glance at the home pc you operate at home or the place of work. It`s designed to run targeted errands. Any components maybe there is, but it consists of instructions so they can hard work. That is why you put in programs. Within defined details, the pc and the can do anything you command word. You might start definitely one surgical operation, allow it to go operate, right after start up an alternative without ever disturbing the whole process of first a. Once you art print over text messaging, the computer squeezes a suitable tips about the printing onto canvas appliance, after continuously get the job done. The PC does not have to hesitate until the device is finished, the very same idea having the video poker online game. Computers could be programmed to compose virtually every potential internet poker manual, more than once. Pros understand within a few minutes or even a periods. The pc and the are operating in nanoseconds. Throughout the duration it only takes so you can help pass, your computer will often have ignored each individual practical line-up over a hundred circumstances.

http://www.radioare.se/2018/03/a-result-of-the-advanced-expertise-presently/< br />
Thursday Oct 5 2017, 6:39pm WalterSkida (from Ecuador) says...
Watch hundreds of hot sex videos and view thousands of hot amateur homemade xxx photos. Rate other members and even judge their movies and images!
Share your private pictures and upload porn clips. Join our community here at Meendo and discover what surprises we have in store for you!
It's all here and best of all, it's entirely free!

http://bit.ly/2xca4PJ - Real homemade XXX photos and sex videos

Real homemade XXX photos and sex videos

Find real people looking for sex on our free sex dating site. Search adult personals and find sex opportunities in your city!
Join our growing community of sexy people and chat with them, have virtual sex online and meet them for real action!

http://bit.do/dHL3S - Real adult personals and online sex site

Regarder des centaines de videos de sexe chaud et voir des milliers de photos amoureuses amateurs de xxx maison. Notez les autres membres et meme jugez leurs films et images!
Partagez vos images privees et telechargez des clips porno. Rejoignez notre communaute ici a Meendo et decouvrez les surprises que nous avons en reserve pour vous!
C'est tout ici et le meilleur de tout, c'est entierement gratuit!
Wednesday Nov 9 2016, 2:37am RobertTut (from Argentina) says...


Nike Cortez Gialle
Adidas Superstars Galaxy
Adidas Ultra Boost Triple Black Release
Adidas Los Angeles Zalando
Adidas Nmd Pink Salmon Price
Friday Mar 27 2015, 4:14am Ed says...
Would you be interested in sharing the more tech details and perhaps software?
Friday Mar 27 2015, 4:13am Ed says...
Awesome! Been wanting to do this myself, but with a cheap android mobile phone. I just wonder if it would operate in those temperatures. Have an app that takes a snapshot every couple of seconds, or just a huge SD card and run video for the duration.
Friday Jul 26 2013, 7:50pm scott (from chch) says...
That's awesome!
Tuesday Jan 24 2012, 11:21am James Powell (from UC Mech 2007) says...
Impressive. A very cool project. I look forward to seeing the pictures! Jesse put me on to your site. Cheers
Saturday Jan 14 2012, 4:28pm Su Macann (from Christchurch) says...
I can't believe you found your high altitude balloon kit after it travelled all that way! Well done!
When is the camera part coming???

Leave a comment?

Your name:
From?: (optional)
Icon: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,
Your comment: