Recap of EOSS-091

LAUNCH DATE: 11-Jun-2005
LAUNCH TIME: 07:27 am MDT (13:27 UTC)
LAUNCH SITE: Deer Trail, Colorado (directions)

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 - Deer Trail
Launch Point: 39.6114� lat.   -104.0426� long.
Grid: X=6.17 Y=16.07
Ascent Rate: 1000 feet per minute
Descent Rate: 910 feet per minute
Altitude: 5205 feet
Predicted Landing Site
Landing Point: 39.932� lat.  -103.462� long.
Grid: X=36.9 Y=38.2
Altitude: 4500 feet
Flight Time: 131 Minutes
Bearing: 54.1� True
Range: 37.9 Mi.
Actual Landing Site
Landing Point: 39.9393� lat.  -103.5849� long.
Grid: X=30.4 Y=38.7
Bearing: 46.9� True
Range: 33.204 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 274.5� True
Range: 6.524 Mi.

EOSS Frequencies:

Global Frequencies


Flight Systems:


Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 3000 cu. ft
Payload 24.4 lbs
Free Lift % calculated at fill
Ascent Rate 1101.89 fpm calculated (avg)
Descent Rate unknown gps failure during descent
Parachute 10 ft
Peak Altitude 95,101 ft. ASL
Launch Conditions ??

Payload weights as flown

Team Name Grams Pounds
Cornell 622 1.37
Utah State University 626 1.38
Texas A&M 644 1.42
Air Force Research Lab 645 1.42
University of Minnisota 646 1.42
Central Florida 652 1.44
New Mexico State University 653 1.44
Washington University 654 1.44
University of Cinncinati 656 1.45
Texas A&M 657 1.45
University of Missouri Rolla 669 1.47
Universty of Texas 669 1.47
CSGC 607 1.34
Sub-total 8400 18.52
Grand Total 8400 18.52

Payload Configuration:

No PDFs available this time out. Webmaster is away from his usual toolset.

Internet Gateway Stations:

as seen on Findu.Com

For AE0SS-11

  • AB0XK - Robert R Roe (Russell, KS - thanks)
  • K0UT - Bill Beach
  • K0YG-7 - Mark Patton
  • KC0LNO - Michael M Skinner
  • WA0VSL-4 Doug Wilson

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 maintain the data flow quite nicely.

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:

Help us build a database of the best RDF/Observation sites in Eastern Colorado. See the Observation Site Database page for ideas on what we'd like to see in this DB and if you're interested in the Balloon Track use of that database.

EOSS Grid:

Grid for June 11, 2005

Location Grid X Grid Y
Last Chance 30 25
Agate 11 6
Ft. Morgan 20 60
Cope 69 20
Launch Point 6.2 16
Touchdown 48.1 43.2


Tactical Callsigns:

Valid for June 11th, 2005

Tactical Callsign Name Notes
Alpha WA0GEH Marty coordinator
Bravo K0JLZ and K0AEM Jim and Richard  
Charlie K0SCC    
Delta N0NDM Larry  
Echo K0LOB Jim  
Fox KC0RPS and W0NFW Jim and George  
Golf W0CBH Benjie  
India AE0SS Nick Ground Station


Landing Site:


Spread Sheet (comma delimited)



Our Customer


The launch supported an Air Force Research Lab program called University Nanosatellite. Students from 11 universities took part in the workshop. The workshop started on June 9 and ended with the launch and the launch recap that evening.

The results were very good. All balloonsats worked. All had the same payloads which were camera, HOBO temperature and HOBO pressure, a heater, and a solar cell.

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