Recap of EOSS-154

03/02/2012 15:50 (CDT): This status line was reporting strange things earlier. This update... Corrected launch time. Earlier today, data was posted

Flight Coordinator: Nick Hanks

LAUNCH DATE:July 24th, 2010
LAUNCH TIME: 09:58:00 CDT (14:58:00 UTC)
LAUNCH SITE: Hutchinson Municipal Airport

Pre-flight Prediction and Actual Tracks


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

Map made with MapPoint
Prediction made with Balloon Track


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

Maps by Google Earth

Map Files available in the Data Section below

Launch Site - Hutchinson Muni
Launch Point: 38.06567� lat.   -97.86117� long.
Grid: X=22.31 Y=19.71
Ascent Rate: 1328 feet per minute
Descent Rate: 950 feet per minute
Altitude: 1542 feet
Predicted Landing Site
Landing Point: 38.29641� lat.  -97.58453� long.
Grid: X=37.2 Y=35.6
Altitude: 1500 feet
Flight Time: 132 Minutes
Bearing: 43.2� True
Range: 21.9 Mi.
Actual Landing Site
Landing Point: 38.48969� lat.  -97.40107� long.
Grid: X=47.0 Y=49.0
Bearing: 40.3� True
Range: 38.458 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 36.6� True
Range: 16.633 Mi.
  • Final Pre-Flight Prediction is available here
  • Prediction History is not available

EOSS Flight Day Frequencies:

EOSS-153 Balloon Payload Frequencies

  • Beacons
    • 147.555 MHz
      • CW ID: AE0SS
  • APRS
    • 144.340 MHz
      • 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 Totex
Balloon Type latex
Balloon Size 1200 g
Neck Load 3177 g
Neck Lift 4271 g
Ascent Rate 1320 fpm estimated
Descent Rate 1000 fpm estimated
Parachute 5 ft.
Peak Altitude 80,154 ft. ASL
Launch Conditions somewhat breezy but no problem


Payload Configuration:

Payload Experiment Designer

EOSS GPSL flight

We're off to Kansas to meet and greet with other ARHAB folks at this year's:

Great Plains Super Launch

Experimenters are welcome to submit websites for linking or overviews which I will post on a page on the EOSS website.

Internet Gateway Stations:

as seen on Findu.Com

EOSS-154, AE0SS-11

  • K5PRK-11 - Plano Amateur Radio Club, Plano, TX (wow, 370 plus miles, pretty excellent, thanks)
  • KC5GOI - Guy Story, Denton, TX (better than 350 miles, thanks for the iGate)
  • N0RQ - David Dunbar, Melissa, TX (another 350 plus path. Thanks.)

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.

Tracking and Recovery 

Marty Griffin will be Alpha and will make assignments in person Friday prior to the flight at our digs in Hutchinson

Trip to GPSL

Nick Hanks GPSL2010 Information book

Several different stations will be using HF during this trip. Monitor 7.234 MHz LSB

During the drive out, during the recovery and during the drive back we will be attempting to get our convoy's APRS IDs into the internet. Here are a few callsigns to watch for. Click on them to go to APRS.FI and see their latest positions for the past 12 hours:

The balloon will be AE0SS-11

Nick will be using Twitter to keep folks up to date on our activities. Follow


Text Recaps



Launch Site


  • by SamCam2
Ascending Descending
Up Up
Horizon Horizon
Down Down

Recovery Site




Eoss-154 at GPSL 2010 (take 2)

edit by Rick von Glahn, N0KKZ


EOSS-154, AE0SS-11


 Spread Sheets

  • eoss-154_ae0ss-11_Flight_Data.csv - airborne only KPC3 Log ripped to spreadsheet format
  • not available - KPC3 Telemetry log (internal temps channel being used to test a new baro device and is NOT an accurate temperature measurement)

Mapping Files