GPS module for high altitude unmanned balloon

Hi, we've been looking for a GPS module to use in a high altitude balloon project and we've been able to find only two units (Lassen IQ and Trimble Copernicus) that follow the DoD spec correctly. Unfortunately both of them are a pain to use.

A GPS module should refuse to operate at an altitude of 60 kft AND airspeed of more than 999 knots, but in reality most commercial GPS modules implement these two rules with an "OR" operation.

If you know of any currently marketed GPS unit (preferably with a serial interface) that either joins these two limits with a conjunction ("AND") or implements just the speed limit with no regard for altitude, please link it here.

Thanks in advance :)

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • From past experience with high altitude balloons, don't use Sirf !
    It got stuck at 20km (even the time stopped) and only came back to life when we got below 18km.
    The uBlox LEA-5H datasheet says that it works up to 50km.
    They usually don't lie in their datasheets ;-)
    I intend to use a uBlox module in the next balloon I build.
  • The discontinued chip u-Blox TIM-LP works for sure. I've flown it up to 100,000. No idea about the newer u-Blox products.
  • The one David mentioned is your unit...it works well and has documented flights above 60k.
  • By the way, there's a relatively simple explanation for the lack of high altitude support... 65535 is an easy number to settle on as a maximum, especially given that most applications don't require more than that.
  • Check out this unit from Inventek (it is mentioned on the page that Krzysztof linked to). I've seen these fly to 110k' no problem, and Inventek is capable of working with folks interested in custom firmware, in fact, they list a number of "off-the-shelf" custom builds for their modules. Responsiveness depends on the agent that you talk to when you call.

    I can vouch for the validity of the page that Krzysztof provided: the gentleman who put that together is an avid high-altitude hobbyist.
This reply was deleted.

Activity

DIY Drones via Twitter
RT @Struktur3D: We have just posted on @DIYDrones for the first time in a long time. Continuing with our search for a #lasercutting service…
yesterday
DIY Robocars via Twitter
RT @chr1sa: The dev team is having fun with virtual @DIYRobocars track generation with Unity on the @donkey_car discord: https://t.co/l0Jd9…
Wednesday
DIY Drones via Twitter
Review of the new Nivida Jetson NX for robocars https://t.co/bWjd3sH2o4
Tuesday
DIY Robocars via Twitter
RT @chr1sa: My review of the new @NVIDIAEmbedded Jetson Xavier NX in robotics and @DIYRobocars applications https://t.co/O7TfJZhiF9 https:/…
Monday
DIY Drones via Twitter
RT @chr1sa: Somehow I missed this, but last week @Nvidia released a new version of its Isaac robot development framework. Lots of new Lidar…
Monday
DIY Robocars via Twitter
RT @Smartphone89: DonkeyCar Racing League Korea #donkeycar @diyrobocars https://t.co/mDlHDR1d98
May 29
Jørn Ramnæs liked VIDEO LINK's profile
May 28
Mark Harrison left a comment on Moderators
"Wow, Ning2 looks really great on mobile. I had sort of drifted away as my browse-time went more on my phone, so this is great."
May 28
DIY Robocars via Twitter
https://t.co/rLmFr8M2UK
May 28
DIY Drones via Twitter
Welcome to the new DIY Drones design!. You may have noticed that DIY Drones looks a little different today. That's… https://t.co/cg2EmeDGMQ
May 27
DIY Drones via Twitter
New! Online Training on Drones for Disaster Response https://t.co/brqRuujjY2
May 26
DIY Robocars via Twitter
https://t.co/8EMCvYW6oz
May 25
DIY Robocars via Twitter
RT @OttawaAVGroup: We are going to try something new this week. We will be having a drop-in style meeting Wednesday @ 7-9pm EST. Pop in and…
May 25
DIY Robocars via Twitter
RT @tawnkramer: Thanks Everyone for another fun virtual race! Amazing Ai racers competing head-to-head, Virtual Makers Fair event. Catch us…
May 23
DIY Robocars via Twitter
RT @make: Find out the latest from @diyrobocars at 10am PT from @chr1sa of @3DRobotics on Virtually Make Faire! #makerfaire #maketogether #…
May 23
DIY Robocars via Twitter
RT @Heavy02011: Join us Saturday online: Virtual Race League: @DIYRobocars Race #2 - Parking Lot Nerds https://t.co/aJUu4sdutx #Meetup via…
May 22
More…