Lost Contact With Balloon, Looking For Listeners.
Last Sunday evening The High Altitude Balloon Group Near Space Sciences launched EarthBreeze II, their 51st of these high altitude balloon experiments. We have been doing these flights for almost 25 years now and are always trying something new.
All was going well for the first three hours of flight. Then as it was nearing the coldest altitude, It began to operate oddly. Maybe some background of the flight is in order here first. Please go to the following web page to learn all about this flight. It is a very unique flight.
Ok, symptoms of behaving oddly. As I said as the payload traveled into the colder parts of it's journey, one of the last telemetries had it being -47 deg C! The RTTY transmissions were designed to have a 200 Hz shift. controlled by a crystal. As the flight continued on, this shift was widening. towards the end it was almost double at about 400 Hz shift. Also additional symptoms were the actual frequencies were rising higher and higher in the waterfall audio passband. Towards the end almost a full KC higher than intended. This of course was also controlled by a crystal. So being nearly -50 deg C it was expected.
But what started to happen next was not expected. The transmitter was set to transmit at 15 seconds after the minute. This was being controlled by the clock in the GPS system. It was slowly transmitting later and later and later, and nearly a full minute late towards the end.
Then the last transmissions heard were very strange. Longitude position of -184 degrees? It should have parked at this time at near 70 thousand feet. Then the last transmission came down, and it was a very wide shift RTTY signal probably close to 500 Hz and did not have enough time to adjust the software for a decode. in addition in the short transmission, what 10 seconds? it swept in frequency a good 400 Hz down in the waterfall.
That was the last anyone has heard from it.
Now we are asking for everyone to listen for it. Unless the electronics were actually damaged by the cold, once they thaw out, this should start to transmit again. even if the on-board batteries die it should still transmit during the day because of the solar panels. If it's still flying it may still be froze up since it's in a location where last checked it is -55 deg C, but it has to come down eventually, and then it will warm up, if it hasn't landed already. Even on the ground this can be heard, pre launch it was being heard by several stations via skip.
So we are looking for people to try to hear this run away payload. unless it was damaged, it should eventually come back to life.
Any info or questions feel free to ask.
Near Space Sciences
This is rather jumbled and confusing. Way too much information. How about just posting a map with the track, last known position and transmitter frequency!
"RF gotta go somewhere!"
From the provided link, i quote:
ANTENNA: Vertical Wire Dipole
TRANSMITTER: 500 milliwatt RTTY and CW Transmitter.
FREQUENCY: USB And a Dial Frequency of: 10.145
RTTY Tones will appear at approximately 1600 and 1800 in the waterfall. CW will appear at the 1800 point.
RTTY is 200hz shift, 110 Baud, 8 Bit, None Parity, 1 Stop.
Flight information: http://www.qsl.net/nss/earthbreeze-flight-room.html
It would be nice to know where it was launched from.
Ok Launched from Southwest Wisconsin. Last know Location Just North of Rockford IL.
That does not matter! Because this is not just line of sight, it is on 30 meters. people all around the globe can hear it if the ionosphere propagates it.
When it was sitting on the ground before liftoff people from all across the USA was hearing it. So you do NOT need to be local to the flight. Matter of fact you are better needed if you are not local because ground wave is only going to go a few miles at best, but a skip window could be huge and you need to be far away for tht.
Southwestern Wisconsin? You fellows should be trout fishing.
OK, will listen on 30 meters as well as let the Argo run and check it now and then.
Sounds like fun.
Thanks, and I thought it was launched from Area 51 which would explain the secret launch location and track.
Would be helpful to know its last known location and track, in the event it came down near one of the "listeners".
Originally Posted by KC9XG
See Post #5?
Between Rockford IL and janesville, WI.
Between Rockford, IL and Janesville, WI is not particularly helpful. Please provide last known location and heading. Which way was it headed? With the vague locations given it could be headed anywhere, including my QTH sw of Chicago.
Whatever goes up must come down. The vertical dipole antenna would likely be collapsed or destroyed when it hit the ground. Maybe, just maybe, the transmitter is still functioning but without an effective antenna, it would not be very efficient. Someone might be able to hear it via groundwave and use this to locate it. Users along a forecasted track could be alerted, if the forecasted track is not classified information.
I am hearing occasional bursts of a really bloopy sounding FSK signal on that frequency. I don't have a digi interface hooked up at the moment, so I haven't tried decoding it. I heard one short burst of erratic sounding CW on the frequency, too, but it hasn't returned and I was not near the radio when it happened. I think the FSK bursts are about 5 minutes apart. The signals are about S9. There are WINMOR and packet signals around it, too. That seems to be a popular place for tuning up today, too. From 70,000 feet I would not be surprised to hear it direct here in Minnesota.
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