Flight Announcement for EOSS-176

 | Frequencies | Flight Systems | Payload Config | I-Gates | T & R |

Flight Coordinator: Nick Hanks, N0LP (n0lp@eoss.org)

LAUNCH DATE: June 9th, 2012 (wx delay +1 day)
LAUNCH SITE: Omaha, NE (generally)

Three possible candidate launch sites:

  • A. Strategic Air and Space Museum, Ashland, NE N41� 01�, W096� 19.09� (41.01650, -96.31822) @ 1189 ft.
  • B. Underwood High School, Underwood, IA N41� 23.40, W095� 40.11 (41.38997, -95.68589) @ 1146 ft.
  • C. Mead High School, Mead, NE N41� 13.88, W096� 29.28 (41.23132, -96.48805) @ 1207 ft.


EOSS Flight Day Frequencies:

Tracking and Recovery Frequencies

EOSS-176 Balloon Payload Frequencies

  • Beacons
    • 147.420 MHz
      • CW ID: K0SCC
  • 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
  • 147.420 MHz
    • ID: K0SCC-11

EOSS-176 Balloon Non-Emitting Payloads

  • Batmobile
    • Dual GoPro DVRs (up and down)
    • GoPro looking towards horizon

Flight Systems: 


Balloon Manufacturer Totex
Balloon Type latex
Balloon Size 3000 g
Neck Load 7.6 Lbs.
Neck Lift 18.61
Ascent Rate 1329 fpm estimated
Descent Rate 950 fpm estimated
Parachute 5 ft.
Peak Altitude determined after flight
Launch Conditions determined at launch


Payload Configuration:

Payload Experiment Designer

EOSS, we're flying for fun at the Great Plains Super Lauanch (GPSL)

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

Internet Gateway Stations:

Future I-Gaters:

EOSS is always in need of I-Gate stations. Check out the EOSS I-Gate page for information on how to participate and why we need you.

Current I-Gate Station:

If you are present at your iGate during the flight try and monitor the tracking and recovery frequency. The ground station likes to check the frequency prior to launch to find out if any stations are out there ready to igate the traffic onto the net for the FAA to monitor.

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.

Your Log Files

Our technical committee members would also request you open a log file and record all the packets you hear and forward onto APRS-IS. Whenever there is a technical failure of a package it is always helpful to have the most complete dataset possible to attempt to determine the cause of failure and possible fixes. After a flight send your data files to me (webmaster) and I will distribute them to the appropriate payload builders. They appreciate these logs even if all goes fine during a flight.

Tracking and Recovery  

NEWS FROM Webmaster

The tactical callsigns will be used throughout the trip to GPSL both on the road trips out and back as well as the T&R operations on flight day.

We will be running a launch and recovery operation with all EOSS attendees at GPSL. Bring your DF gear just in case. If you can mobile iGate bring that equipment as well.

Grid and Roster updated on the day before flight


Location Grid X Grid Y
Holiday Inn Express (41.21417 N, 96.08000 W)    


Tactical Call Signs


Call sign



Alpha WA0GEH (AE0SS on flight day) Marty, Sharon and John Tracking and Recovery
Bravo N0NDM Larry and Chris  
Charlie W9CN Mike and Miles  
Delta KC0RPS Jim and Glenn  
Echo N0KKZ Rick  
Fotrot N0MPM Mike  
Golf K0SCC (AE0SS on Thursday and Sunday) Steve, Parker, and Nick  
Hotel WA9WWS Don and Dan