Recap of EOSS-130

03/02/2012 15:50 (CDT): Mainly photos added

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Mileage Compensation Form

This flight should be a compensated event so fill out the form for your reimbursement

Flight Coordinator: Marty Griffin, WA0GEH

LAUNCH DATE: July 26th, 2008 (wx +1)
LAUNCH TIME: 08:10 MDT (14:10 UTC)
LAUNCH SITE: Deer Trail, CO (directions)

Pre-flight Prediction and Actual Track


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

Map made with MapPoint
Prediction made with Balloon Track


Green Track = Ascent
Red Track = Descent
Prediction and Actual tracks made with Balloon Track

Maps by Google Earth

Orientation looking towards 165 degrees true

Map files available in the data section


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

Map made with MapPoint
Prediction made with Balloon Track


Green Track = Ascent
Red Track = Descent
Prediction and Actual tracks made with Balloon Track

Maps by Google Earth

Orientation looking towards 190 degrees true

Map files available in the data section

Launch Site - Deer Trail
Launch Point: 39.61137� lat.   -104.04255� long.
Grid: X=29.22 Y=30.07
Ascent Rate: 1400 feet per minute
Descent Rate: 950 feet per minute
Altitude: 5205 feet
Predicted Landing Site
Landing Point: 39.70699� lat.  -103.74623� long.
Grid: X=44.9 Y=36.7
Altitude: 5000 feet
Flight Time: 129 Minutes
Bearing: 67.2� True
Range: 17.1 Mi.
Actual Landing Site
Landing Point: 39.63199� lat.  -103.99353� long.
Grid: X=31.8 Y=31.5
Bearing: 61.4� True
Range: 2.972 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 248.6� True
Range: 14.129 Mi.

Prediction History is available here

EOSS Flight Day Frequencies:

Global Frequencies

  • Tracking and Recovery Operations
    • VHF/UHF
      • North flight track: 449.450 MHz RMRL Repeater (103.5 Hz Tone) backup
      • 146.550 MHz simplex (for both field ops and the launch site)
      • Repeater Coverage Pages - Listings of all repeaters available in the expected flight areas.
    • HF
      • 40 meters 7.245 MHz
    • FRS Comms (tentative)
      • Channel 8
      • 467.5625 MHz

EOSS-130 Balloon Frequencies

  • Beacons
    • 145.600 MHz
      • CW ID: K0ANI
  • APRS
    • 144.340 MHz
      • ID: KC0YA-11
      • DIGI: EOSS
      • Node: BALND2
      • APRS Time Slotted Every 30 seconds at 0:15 and 0:45
        • power up at 13 seconds past the GPS minute to properly slot telemetry
      • Telemetry once a minute
      • Sample Data
  • 145.600 MHz
  • ID: K0ANI-11

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 our launch site. Flight day coverage may vary depending on upper air winds.

Flight Systems:


Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 3000 gram
Neck Load 25.6 lbs.
Free Lift % calculated at fill
Ascent Rate 1023.19 fpm avg to burst
Descent Rate 1088.6 fpm avg below 10K
Parachute 10 ft
Peak Altitude 97,774.28 ft. ASL
Launch Conditions mild breeze


Payload Configuration:

Tracking and Recovery Info: 


Location X Y
Last Chance 53 39
Test Point (39� 30' N , 103� 15' W) 71.3 22.5
Touchdown (see Prediction Page)


Tactical Callsigns


Call sign





Colin & Tim (no call)

Tracking and Recovery Coordinator



Marty and Mark Patton




Glenn, Darren, Loren, Sam, and Jim (no call)

The Big White Bus



Chris and Rob








Larry & Benjie

Launch Coordinator




Ground Station




CU Liaison

Special Note to the T&R Team

All trackers need to bring their DF equipment.  We are potentially going to be in some rough terrain and we may not see this one touch down or be close enough to get right to it.

Internet Gateway Stations:

as seen on Findu.Com

For KC0YA-11

  • K0ANI-14 - Larry Cerney, Denver CO (maybe mobile)
  • KB0YRZ - Chris Krengel, Deer Trail and the Chase (mobile)
  • KC0D-3 - Mark Patton, Foxfield, CO
  • KC0VJE - Louis Perley, Nunn, CO
  • N0EB-1 - Richard Beggs, Northglenn, CO
  • N0PSJ - Christopher Holmes, Arvada, CO

For KoANI-11

  • KB0TVJ-4 - Russ Chadwick
  • KC0D-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. Did you know I publish predictions for i-gates? I keep a list of everyone who has ever i-gated an EOSS balloon flight. You're all in the list so if you're wondering when the balloon will pop up over your horizon, check out this page for future flights.  Currently predictions are being made for 29 i-gates.

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 or maximum elevation, 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.


Launch Site

  • by Mark Patton, KC0D
  • page 1 - People and things at the launch site
  • page 2 - Balloon Prep and Fill
  • page 3 - Launch Site Payload Handlers and Launch
  • page 4 - Some of the payload systems


  • by Sam-Cam

Recovery Area

  • by Mark Patton, KC0D


recorded but not yet edited



Played sequentially, you will hear all the Tracking and Recovery audio. The recorder is voice activated so silences longer than 3 seconds are automatically removed.



Quick Launch video by by Darren Kalmbach, KC0ZIE

Ron Schaffer WD0BDQ, has posted some videos from Deer Trail showing the prep and launch.

Rick von Glahn N0KKZ, stitched together the 204 final frames the sam-cam captured while waiting on the ground for retrieval. You can see minimal movement as the wind slowly tugs the payloads into firmer positions





Spread Sheets

Mapping Files



Spread Sheets

Mapping Files


  • by Rick von Glahn, N0KKZ (later)

by Nick Hanks, N0LP