Recap of EOSS-112

LAUNCH DATE: 01-October-2006
LAUNCH TIME: 8:17 am MDT (14:17 UTC)
LAUNCH SITE: Windsor, CO (driving directions)

Photo by Russ Chadwick, KB0TVJ

Pre-flight Prediction and Actual Track

Blue = Actual Track
Green = Predicted Ascent Phase
Red = Predicted Descent Phase

Maps made with MapPoint
Prediction made with Balloon Track

Launch Site - Windsor
Launch Point: 40.4737� lat.   -104.9623� long.
Grid: X=-22.43 Y=25.57
Ascent Rate: 1100 feet per minute
Descent Rate: 950 feet per minute
Altitude: 4931 feet
Predicted Landing Site
Landing Point: 40.5138� lat.  -104.114� long.
Grid: X=22.1 Y=28.3
Altitude: 5000 feet
Flight Time: 97 Minutes
Bearing: 86.2� True
Range: 44.6 Mi.
Actual Landing Site
Landing Point: 40.5357� lat.  -104.3179� long.
Grid: X=11.4 Y=29.9
Bearing: 82.6� True
Range: 34.102 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 278.1� True
Range: 10.807 Mi.

EOSS Flight Day Frequencies

Global Frequencies

Balloon Frequencies

  • Beacon
    • 147.555 MHz
      • ID: AE0SS (CW)
    • 145.600 MHz
      • ID: K0YUK-11
      • Tracking Tone then CW ID then APRS
  • 445.975 MHz
  • ID: K0ANI-13
  • Tracking Tone then CW ID then APRS
  • APRS
  • 144.340 MHz
  • ID: AE�SS-11
  • Node: BALNOD
  • APRS Time Slotted Every 30 seconds at 0:00 and 0:30
  • power up at 58 seconds past the GPS minute to properly slot telemetry
  • 145.600 MHz (flight Qualify)
  • ID: K0YUK-11
  • Tracking Tone then CW ID then APRS
  • 445.975 MHz (flight Qualify)
  • ID: K0ANI-13
  • Tracking Tone then CW ID then APRS

Flight Systems

Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 3000 gram
Payload 25.5 lbs
Free Lift % calculated at fill
Ascent Rate 1207.6 fpm averaged during ascent
Descent Rate 1089 fpm average below 10K feet
Parachute 10 ft
Peak Altitude 71,816.93 ft. ASL
Launch Conditions Calm


Payload Configuration

Experimental Systems

NOAA AirCore. This is NOAA's experiment to sample the atmosphere using a coil that evacuates air during the ascent and then refills with a column of air as it descends back to the ground. Links to NOAA webpages, and some photos are posted to the recap page for the AirCore.

Photos and Additional Links

note: customers are welcome to submit detailed synopses of their flights or web links to their own web sites.

Internet Gateway Stations

as seen on Findu.Com

For AE0SS-11

  • K0YG-7 - Mark Patton - Foxfield, CO
  • KC0LNO - Michael M Skinner, Monument, CO
  • N0PSJ - Christopher Holmes, Arvada, CO
  • WA5VRL - Willis Whatley, Ft. Collins, CO

For K0ANI-13

  • K0YG-7 - Mark Patton - Foxfield, CO
  • K0ANI-7 - Larry Cerney, Denver, CO
  • KC0LNO - Michael M Skinner, Monument, CO

For K0YUK-11

  • KI4GYZ - Art Hostmark, Thornton, CO
  • K0YG-3 - Mark Patton - Foxfield, CO

EOSS wishes to express our sincere appreciation to the stations above who iGated the balloon APRS telemetry onto the internet.

We are relying heavily on real time position information available on the net to allow the FAA controllers to have up to the minute location data to assist them in air traffic control.

Redundant stations for the balloon iGating provide excellent coverage. If you are able to iGate we invite you to join the Internet Gateway Team. Contact me ( to be put in touch with the coordinator. By joining the team, you are giving peace of mind to the iGate coordinator for that flight. He knows you'll be there and he can rely on you.

Naturally, anyone can iGate data onto the net and even if you aren't a member of the team we will welcome your contribution to the internet based tracking effort. If you callsign appears on the log, you'll be shown as a contributing station as those above are.

Having more than one station covering each APRS beacon means that should a station drop out momentarily, the others can often maintain the data flow.

Thanks again guys! The FAA (and EOSS) are very grateful for your assistance in this endeavor.

Future I-Gaters:

Check out the EOSS I-Gate page for information on how to participate and why we need you.

Current I-Gate Stations:

Guys, the prediction program used to determine the track of the balloon prior to flight can now output a prediction for the Rise, Closest Approach, and Set of the balloon for each of your stations. I have posted a prediction page for stations that I have been able to discover geographic coordinates. See the I-Gate prediction page for an example. The page will not be updated daily, however, it will be updated the evening prior to flight for I-gate planning purposes.

I have often been asked by iGaters when they should expect to either start receiving signals (AOS) or expect to see those signals disappear (LOS). This prediction page should answer all those questions for you.

Tracking and Recovery Info

(as of Sunday Morning , 10/01/06 01:15 MDT)


Location X Y
West Junct. of SR-14 and SR-71 45 35
Peetz 75 59.3
Otis 82.6 3
Roggin 8 4.5
Touchdown (see Prediction Page)

note: During the net I copied down 79, 59.3 for Peetz. However, I received an email with the above x value of 75. So, be forewarned. All other coordinates agree.

Tactical Callsigns

Tactical Callsign Name Notes
Alpha N0NDM, W0CBH Larry and Benjie Tracking and Recovery Coordinator
Bravo N0MPM Mike  
Charlie KC0RPS, W0NFW Jim and George  
Delta KB0QQW Chris and son  
Echo KC0VJE Louis  
Foxtrot WA0GEH, N0AUS Marty and Al  
Golf WB0DKT Glenn and Darren  
Hotel KB0YRZ Chris  
India AE0SS Nick Ground Station


Launch Site

Recovery Site


Tracking and Recovery audio of the flight as recorded from the Rocky Mountain Radio League's 449.450 MHz repeater.


The Launch


Text Files

Spread Sheet (CSV) Files