Announcement of EOSS-119

LAUNCH DATE: July 7th, 2007
LAUNCH TIME:  08:00 am CDT (13:00 UTC)
LAUNCH SITE: Grand Island, NE

Tracking and Recovery Team
Flight Day Breakfast

  • HoJo's

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 1000 fpm estimated
Descent Rate 950 fpm estimated
Parachute 5 ft
Peak Altitude determined after flight
Launch Conditions determined at launch


Payload Configuration:

Tracking and Recovery Info:

From previous flight and left here as an example of this data for typical flights. This section may or may not be updated for our Grand Island flight.


Location X Y
Last Chance 45 40
Touchdown (see Prediction Page)


Tactical Callsigns

Tactical Callsign Name Notes
Alpha WA0GEH and N0AUS Marty and Al Tracking and Recovery Coordinator
Bravo KC0VJE Louis  
Charlie KC0RPS and W0NFW Jim and George  
Delta WG0E Colin and Tim (no call)  
Echo KB0QQW Chris and Caleb  
Foxtrot AC7FY andW7SJW Clint and Stan  
Golf WB0DKT, KB0OKA and KC0ZIE Glenn, Edna and Darren  
Hotel KC0UUO and KD5MUL Rob  
India N0NDM and W0CBH Larry and Benjie  
Juliet KB0YRZ Chris  
Ground AE0SS Nick Ground Station


Internet Gateway Stations:

Even thought EOSS is flying out of Grand Island Nebraska, we'd still appreciate any help we can get in iGating our position data into the APRS-IS system.

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.