Recap of EOSS-119

LAUNCH DATE: July 7th, 2007
LAUNCH TIME:  06:51:56 am CDT (11:51:56 UTC)

Pre-flight Prediction and Actual Track

Tracks for AE0SS-11

Predict vs. Actual

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

Map made with MapPoint
Prediction made with Balloon Track


Predict vs. Actual

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

Maps by Google Earth

Tracks for W0WYX

Predict vs. Actual

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

Map made with MapPoint
Prediction made with Balloon Track
Speed Superimposed on Track

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

Maps by Google Earth
Launch Site - Doniphan
Launch Point: 40.77782� lat.   -98.37286� long.
Grid: X=48.50 Y=42.42
Ascent Rate: 1100 feet per minute
Descent Rate: 950 feet per minute
Altitude: 1800 feet
Predicted Landing Site
Landing Point: 40.49879� lat.  -98.71632� long.
Grid: X=30.7 Y=23.2
Altitude: 1800 feet
Flight Time: 128 Minutes
Bearing: 223.2� True
Range: 26.4 Mi.
Actual Landing Site
Landing Point: 40.50314� lat.  -98.82875� long.
Grid: X=24.8 Y=23.5
Bearing: 231.7� True
Range: 30.497 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 272.9� True
Range: 5.911 Mi.

Prediction History for EOSS-119 AVAILABLE HERE

EOSS Flight Day Frequencies:

EOSS-118 Balloon Frequencies

  • Beacon
  • APRS
    • 144.340 MHz
      • ID: AE�SS-11
      • DIGI: EOSS
      • Node: BALNOD
      • APRS Time Slotted Every 30 seconds at 0:00 and 0:30
      • Telemetry once a minute
        • power up at 58 seconds past the GPS minute to properly slot telemetry
      • Sample Data
  • 147.555 MHz
  • ID: W0WYX (no ssid)
  • Output of the RMRL Cross band Repeater
  • Cross band Repeater
  • Input: 445.975 MHz
  • Somewhat deaf needs a very powerful input signal. We're flying it to have a backup beacon and APRS system
  • Output: 147.555 MHz
  • APRS packet string once per minute
  • CW ID: W0WYX (RMRL club callsign)

Flight Systems:


Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 1200 gram
Payload 11.7 lbs.
Free Lift % calculated at fill
Ascent Rate 949.9 fpm average
Descent Rate 842 fpm average below 10K feet
Parachute 5 ft
Peak Altitude 90,849.73 ASL
Launch Conditions breezy, no problems though. Good tree wind break.


Payload Configuration:

Tracking and Recovery Info:


Location X Y
HoJos 50 50

Tactical Callsigns

Tactical Callsign Name Notes
Alpha N0MPM Mike Tracking and Recovery Coordinator
Bravo WB0DKT Glenn and Edna  
Charlie K0SCC, N0LP Steve, Nick and Daryl  
Delta K0YUK Merle  
Echo N0KKZ, W5VSI Rick and Mike  
Foxtrot W0CBH, KC0SOW Benjie and Marcia  
Golf WA0GEH Marty and Sharon  


Internet Gateway Stations:

as seen on Findu.Com

For AE0SS-11

  • KE6DZD - Wayne Jorns, Bellevue, NE
  • N0YXV-1 - Stanley Coleman, Grand Island, NE
  • W0ZC-2 - Zach Clobes, Hutchinson, 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's always nice to have a central repository for all this positional information and, folks in distant places who are into ballooning are always delighted to be able to track the flights live. So, thanks to the Nebraska iGates, two of whom N0YXV - Stanley and WY0F - Jack, are regulars igating even our Colorado flights, and Wayne for joining the effort. And we had a Kansas iGater too, W0ZC-2 - Zach. We missed you at GPSL, guy. Once you've hosted your supposed to come to the other events and kick back with your feet up while you watch the new host go crazy. And, for the record, Roger did a terrific job. Everything that was under his control was (I believe) perfect.

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.


I have more photos and will get to them in the next day or so. Marty, Harry, Mark ... I'll get them posted soon

Currently all links lead to PhotoSets on Flickr. There were quite a few good photographs. I only edited out those that were technically not so hot or perhaps not so interesting compositionally speaking. In other words, I uploaded around 95% of what I've received. I did reduce them is size to around 2 megapixels. Most all of the photos are larger than that (not all, but most) so if you need something larger for some purpose, let me know, I may have one on the computer.

Launch Site

Landing Site

Launch, Landing, and GPSL photos


No repeater/simplex audio recorded this time out.


Lots of video but I have to edit it and get it onto YouTube before I can create an embedded video page.

Data Files

Data files for other groups are archived HERE at the EOSS website for safe keeping.

Text Files

Spread Sheet Files

Mapping Files

Google Earth