General Radio Coverage

Flight Announcement Page

09/12/2014 11:58:59 (CT) - Payload Plan update, T&R operations updated

Recap Maps | Frequencies | Flight Systems | Payload Config | I-Gates | T & R | Text Recaps | Photos | Audio | Video | Data | Charts

FAA Waivers for 2014
Launch Site AttendeesPlease read


Flight Coordinator:
LAUNCH DATE:September 27th, 2014 (1 day wx delay)
LAUNCH TIMES: 07:10 am MDT (13:10 UTC)
LAUNCH SITE: Eaton, CO (driving diretions)

EOSS Flight Day Frequencies:

Tracking and Recovery Frequencies

  • Preflight Net:
    • 147.225 MHz CRA Repeater (107.2 Hz Tone) 8 pm MDT preceding night
    • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the CRA machine is down
    • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency
  • Recovey Operaions
    • 449.450 MHz RMRL (103.5 Hz Tone) 
    • 448.225 MHz (141.3 Hz Tone)  Testing
    • 446.100 MHz Field Simplex
      • Note: Some radios insist on incorrectly placing a negative 5 MHz offset when selecting frequencies from the simplex portion of the 70 CM band. Check your radio and if this is the case. Consider programming in this simplex frequency to a memory channel as some radios have demonstrated the annoying habit of re-inserting the offset if you momentarily shift to a repeater then return to the simplex freq. Check the operation of your radio on this simplex freq to be ready for however your radio behaves.
    • 146.550 MHz Backup field simplex
  • Repeater Coverage Pages - Listings of all repeaters available in the expected flight areas.
  • There may be FRS operations see THIS PAGE for a list of channel numbers and their associated UHF Frequencies.


Ground Stations Frequencies

  • Launch Site Simplex
    • 146.550 MHz
  • HF - Possible ops
    • 7.235 LSB


EOSS-199 Balloon Payload Frequencies

  • Beacons
    • 147.420 MHz
      • CW ID: K0SCC
  • APRS
    • 144.340 MHz
      • ID: AESS-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


Various Online Live Tracking Pages

Flight Systems:


Balloon Manufacturer Hwoyee
Balloon Type latex
Balloon Size 3000 g
Neck Load 23.4 lbs.
Neck Lift 27.9 lbs.
Ascent Rate 1329 fpm estimated
Descent Rate 950 fpm estimated
Parachute 10 ft.
Peak Altitude 97,000 ft. estimated
Launch Conditions determined at launch


Payload Configuration:

Payload Experiment Designer

N)AA/LASP Optical Fiber Test Reel Payload

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  

from last flight




TrackPoint Grid Reference Location

Grid X

Grid Y

Last Chance



Grid Test   N 39.425, W104.100




Tactical Call Signs 


Call sign





Marty, Mark

Tracking and Recovery Coordinators



Doug, Stephen

Tracking, Recovery







Glenn, Edna, Darren, Tony, Annie

Tracking, Recovery, Big White Bus



Dave, Ryan

Tracking, Recovery




Tracking, Recovery




Tracking, Recovery, Flight Coordinator




Tracking and Recovery, EOSS President




Launch, Tracking, Recovery




Tracking, Recovery, CU Sponsor


Flight Related Info

Support Amateur Radio Repeater Groups

Future Flight Schedule 

as of August 1, 2014

All dates and launch locations should be considered tentative. The WX delay date is indicated by a "plus" x days indicator i.e. +1 means a one day delay is available +7 a one week delay is available. An "n" indicates no available WX delay date.

Tentative in fuchsia
Recently updated in Red

Flight numbers are always in a state of flux and so are not highlighted as being changed

Flight ID Date WX Delay Comments Balloon Launch Site Mission Coord
27-Sept-2014   NOAAFiber, NG Float Test (6hr 1 x 1200
1 x 4000
Eaton, CO  
15-Nov-2014 +1 CU - Gateway and Demosats 2 x 3000 Windsor, CO  

SGC = Space Grant Consortium at Colorado
GPSL = Great Plains Super Launch
USAFRL = United States Air Force Research Lab
NOAA = National Oceanic and Atmospheric Administration
JOTA = Jamboree on the Air (Boy Scouts of America)
SHOT = Student Hands On Training
PCDC = Pre-Collegiate Development Program

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maintained by Rick von Glahn


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