Recap of EOSS-111

Links to recap pages posted by other groups at bottom of page

LAUNCH DATE: 5-August-2006
LAUNCH TIME: 8:33 am CDT (13:33 UTC)
LAUNCH SITE: Lyons-Rice Municipal Airport

photo by Rick von Glahn, N0KKZ

L to R - Taylor U, NearSYS, EOSS, and ORB (I think, in the back ground and partially inflated)
Off photo to the right was CNNSP, and CAPnSPACE. WB8ELK filled and launched after this batch was away.

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 - Hutch Lyons-Rice KS
Launch Point: 38.3428� lat.   -98.2269� long.
Grid: X=22.37 Y=39.75
Ascent Rate: 1000 feet per minute
Descent Rate: 950 feet per minute
Altitude: 1680 feet
Predicted Landing Site
Landing Point: 38.5308� lat.  -98.106� long.
Grid: X=28.8 Y=52.7
Altitude: 1500 feet
Flight Time: 138 Minutes
Bearing: 26.7� True
Range: 14.5 Mi.
Actual Landing Site
Landing Point: 38.5009� lat.  -98.1409� long.
Grid: X=27.0 Y=50.7
Bearing: 23.1� True
Range: 11.864 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 222.4� True
Range: 2.798 Mi.

EOSS Frequencies:

Global Frequencies

Balloon Frequencies

  • Beacon
  • ATV
    • 426.250 MHz
      • ID: AE0SS (audio sub-carrier)
  • APRS
    • 144.340 MHz (Payload Train)
      • ID: AE�SS-11
      • DIGI: EOSS
      • 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
      • Telemetry once a minute
      • Sample Data

Flight Systems:

Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 1200 gram
Payload 11 lbs
Free Lift % calculated at fill
Ascent Rate 938.7 fpm avg. to Burst
Descent Rate 903.4 fpm avg. from 10K to ground
Parachute 5 ft
Peak Altitude 90,016.4 ft. ASL
Launch Conditions breezy 5 to 7 mph


Payload Configuration:


Our Customer

EOSS. We were attending the GPSL 2006 event.

Internet Gateway Stations:

as seen on Findu.Com

For AE0SS-11

  • W0JRT - Jerome Tonneson - Lenexa, KS
  • W0ZC - Zach Clobes - Hutchinson, KS
  • KE6DZD - Wayne Jorns - Bellevue, NE
  • N0KTA-2 - Joe Hohnson - Mulvane, KS
  • WY0F - Jack Barnard - Grand Island, NE

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

It was interesting to note that our payload systems have been iGated by several stations in the past.

W0JRT appears as an igate for EOSS-080 and  EOSS-092 (both GPSL flights).

W0ZC appears as an igate for EOSS-080.

N0KTA appears as an igate for EOSS-080.

And of special note ...

WY0F who has igated flights launched from Colorado AND Hutchinson Kansas, nice going Jack!

Looks like Kansas has an excellent team of dedicated iGaters.

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:

Tactical Callsigns

Tactical Callsign Name Notes
Alpha WA0GEH Marty  
Bravo W0CBH, KC0SOW Benjie and Marcia  
Charlie N0KKZ, W5VSI Rick and Mike  
Delta K0SCC, N0LP, KC0RPS Steve, Nick and Jim  
Echo KB0YRZ, KC0UUO Chris and Rob  



Location X Y
Grand Prairie Hotel 40 20

Text Recaps


Launch Site

Landing Site


N0KKZ Flickr Site

I have a Flickr account which allows me to post LOTS of photos. I've posted quite a few GPSL pictures there. Here are some links to "Sets" of photos. You can view the sets as a slideshow if you have Flash installed in your browser.


No Audio from this flight



Video recorded by Chris Krengel, KB0YRZ

Click to Play

  • Shorter version (3:32) for download 9 MB WMV

  • Shorter Version with less compression (better picture quality close to the original VHS tape recording) in h.264 (iPod/Quicktime M4V video) 22.5 MB (probably will be removed after a few months.


Video by Ken Thompson, N0ITL






EOSS Ground Station

University of Colorado Experiment Data

I've added my callsign suffix to the filename to indicate I have edited the file to remove macros and external references. The data is still all there and intact and quite interesting.


Other GPSL Data Files

These data files pulled from have the Findu timestamp in front of each position report. This might be helpful to those who wish to analyze the data from non-timestamped data.

Other GPSL Recap Pages