I have attached the results of the post-processing of the raw data. Hi, Does anybody have C code for this altimeter? GPSL provides a forum for exchange of ideas, and sharing of information between the many groups involved in high altitude balloon experimentation. There are other versions of this chip such as the DS1307 which uses I2C and is used on the Propeller Professional Development Board. A field I kmow absolutely nothing about - but fascinating. Logged BHPete. A good way to monitor balloon launches is to use the tracking and maps available in findU. I retrieved the data file and made a summary graph of the data we were able to acquire. If we're able to recover, I'll post my results. Both plug into the analog pins making them really easy to integrate. Co-Designer of the worlds smallest (known) operational satellite, $50SAT. 602.44 The Minister may issue an authorization referred to in section 602.42 or 602.43 where the release of the balloon or the launch of the rocket is in the public interest and is not likely to affect aviation safety. Our balloon and payload should go about 20 miles up, and we are hoping to stream video for at least some of the flight. Check something like this out P17166-ND or MCP9700A-E/TO-ND. It was an onboard GPS unit and the backup altimeter that that dropped out. That's a pity because, "The problem is in the code you didn't post.". Will you be chasing it in a vehicle? It is the crunching of the raw values that is tricky. APRSISCE/32 is a Windows based APRS client that runs under Windows on desktops, laptops, or notebooks, or Windows Mobile running on Smartphones or other mobile devices. Upwards of several hundred miles (depending on lots of stuff) isnt uncommon and if you need to stop for gas or hit traffic and fall behind you can loose it in just a few minutes. Have you used the pre-flight track estimator tools available? Lev (up above) had the same behaviors in his altitude readings. I'll take a look at the RTC and see if that would be worth it. If you dont have a Amateur Radio License, you cant use APRS. banggood.com has a couple of 2000mW (that's 2 watts) transmitters. They are: 1)the Balloon Report Page Entry point; 2)the APRS tracker on the balloon; 3)the I-Gate link to findU; and 4)the findU server. And my C code was largely based on the SPIN code, though I made a few mods. 20 miles might be more than you need height wise but NOT total range wise. Another important thing to master is knowing [how to speak the FAA language]. We are setting up a kickstarter to hopefully get some more money for additional sensors, cameras, and the fpv setup (I will post the link once its setup for anyone interested in contributing) For now though, any advice is gold. Feel free to correct me if I am wrong. Where electronics enthusiasts find answers. My initial thoughts are that something may have gotten messed up with the wiring as the students tried to cram the sensor into the remaining space on the balloon box. If you dont want to get your license you may try to find a local HAM radio club, I'm sure someone there would be more than happy to help out. Posts: 2155; Joined: Fri Sep 01, 2000 11:32 pm; USER_STATUS: OFF_LINE ; Re: High altitude balloons #22231395. http://learn.parallax.com/propeller-c-simple-devices/sd-card-data, http://learn.parallax.com/multicore-approaches, http://www.parallax.com/product/604-00005, http://www.parallax.com/product/251-03230, http://www.parallax.com/product/721-32212, http://learn.parallax.com/propeller-c-simple-devices/tilt-and-acceleration-mx2125, http://learn.parallax.com/propeller-c-simple-devices/mma7455-three-axis-accelerometer. GSBC 2020 started April 3. It tracked the commercially programmed pressure sensor almost exactly (except that the commercially-programmed sensor capped out before we reached our final pressure). The low-level math starts with the raw values returned by the sensor, D1 and D2, and then crunches them using the 6 parameters stored in the eeprom. As pointed out above there are always two entry points. The spot connects to satellites, and its location can be checked from any smartphone or laptop. To see a list of registered balloons or of VORs available, just leave that selection blank and press “submit” and the current list of VORs and their location will be shown. Unless you're capsule is completely airtight there should be enough air leakage to keep the inside pressure the same as the outside. (I am new to the SparkFun forum, this is my first post). I'm also looking to launch a weather balloon so I'll let you know what I find. You can send us submissions through your team page. High altitude balloon FPV setup I'm not sure if this is the right place for this, but I need some advice on a long range FPV setup, hopefully with a range of around 10-20 miles. A most important thing to do is to decide how much everything will weigh. 602.42 No person shall release an unoccupied free balloon having a gas-carrying capacity of more than 115 cubic feet (3.256 m3) except in accordance with an authorization issued by the Minister pursuant to section 602.44. This information will allow the FSS to issue a Notice to Airmen (NOTAM)for the day of the flight, and also to ensure that air traffic does not come into conflict with the balloon payload. You folks are very helpful. You may also want to rig up some directional antennas, since it should be line of sight the whole way up. Using APRSISCE/32 for ARHAB support is covered in more detail on the APRSISCE/32 Wiki. USER_MINI_PROFILE. I'm not sure if this is the right place for this, but I need some advice on a long range FPV setup, hopefully with a range of around 10-20 miles. We plan on using 2 vehicles to chase is, on starting at the launch, and the other starting about 1/2 way. Period. Thank you for your reply, I have a few questions regarding your answer. An important ballooning/FAA subject is [payload weight] and what has to be done when [payloads exceed 6 lbs]. I think your visual tracking would work better for like a long range glider or something as you have more control over it, and it would be easier to track visually, but its a great idea. However, in reality, there is redundancy that improves this reliability. Often, there are two APRS trackers on the balloon. At minimum, window is extended until December 1, 2020. Forum; Teams; Sign in; Sign up; GSBC 2020 is here! Thank you all. New VORs can be entered into the list, but that takes 1-2 weeks to find, enter and verify VOR location and get that information updated on the two Entry Points and on findU. We want to be able to stream the video for as much of the flight as possible. That is why I asked Lev if he logged the raw values as well as the computed altitude.
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