Recap of EOSS-86

Items needed for recap:

  • Recaps from whoever wishes to submit them

LAUNCH DATE: December 12, 2004
LAUNCH TIME: 08:58 am MST (15:58 UTC)
LAUNCH SITE: Pueblo, CO (directions)

EOSS-86 Track

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

Maps made with MapPoint
Prediction made with Balloon Track

Launch Site - Pueblo CSU
Launch Point: 38.3058� lat.   -104.5778� long.
Grid: X=-1.64 Y=71.17
Ascent Rate: 1100 feet per minute
Descent Rate: 910 feet per minute
Altitude: 5000 feet
Predicted Landing Site
Landing Point: 37.7537� lat.  -103.3506� long.
Grid: X=65.3 Y=33.1
Altitude: 4900 feet
Flight Time: 124 Minutes
Bearing: 119.4� True
Range: 76.9 Mi.
Actual Landing Site
Landing Point: 37.6589� lat.  -103.4401� long.
Grid: X=60.5 Y=26.5
Bearing: 125.5� True
Range: 76.3 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 216.8� True
Range: 8.2 Mi.

EOSS Frequencies:

Global Frequencies

Balloon Frequencies

  • Beacon
    • 147.555 MHz
      • ID: AE�SS in CW
      • Tone then CW ID
    • 445.975 MHz
      • ID: K�ANI-11
      • Tone then CW ID and APRS packet
      • Flight Test of new system
  • APRS
    • 144.340 MHz
      • ID: AE�SS-11
      • DIGI: EOSS
      • Node: BALNOD
    • 445.975 MHz
      • ID: K�ANI-11
      • Flight Test of new system
  • ATV
    • 426.250 MHz (AM Color)
      • ID: AE�SS in CW

Flight Systems:

Balloon Manufacturer Kaymont
Balloon Type latex
Balloon Size 3000 gram
Payload 18.05 Lbs.
Free Lift % 13%
23.18 lbs
Ascent Rate 1048.99 fpm measured
Descent Rate  900 fpm estimated (gps failure)
Parachute 10 ft. diameter
Peak Altitude 103,334 ft. ASL
Launch Conditions Very windy. Lucky to get a launch

Payload Configuration:

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:

Location Grid X Grid Y
Hawley 45 50
Toonerville 75 36
Avondale 10 67.5
Thacher 23.5 20
Predicted Touchdown 65.3 33.1
Launch -1.64 71.17

Internet Gateway Stations:

as seen on Findu.Com


  • K�YG-7 - Mark Patton
  • KC�LNO - Mike Skinner
  • WB�BLV - Lee Sublett
  • WA�VSL-6 - 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.


Ground Station:

Launch Site:

none of launch activities yet

Recovery Site:


For those of you who missed the in person meeting December 2004, there was some nice video to watch. Of interest to the broadest audience, here are two videos in Windows WMV format.

  • eoss086_web.wmv is approximately 5 megabytes. It's a 2 minute video of the ATV received at the ground station. Because of compression, it isn't all that good. However, the burst is worthy of watching.
  • eoss086_shortburst_web.wmv is approximately 1 meg and just shows the burst. It is equal to the quality above and should be an easier download for some folks.

Here it is streaming from YouTube





All sources above combined




Our Customer

Colorado State University at Pueblo

Radio Coverage:

  • Green, you should be able to work the payload systems.

  • Red, is the border of the received signal. Red appears jittery because it is depicted topographically. Thus, the red dots on the eastern half of the map but well within the maximum distance show hilly terrain behind (east) which reception is not possible.

This is a generic 95,000 ft ASL coverage map for flights that depart from the vicinity of Pueblo, Colorado. Flight day coverage may vary depending on upper air winds.

HF Radio

There was no HF net for EOSS-086