Announcement of EOSS-100

EOSS-100 is a special flight! And, November 2005 marks EOSS's 15th anniversary. We plan to make this a memorable event. There are several scheduled activities. If you plan to attend, and EVERYONE is welcome, please check out the 100th Flight Announcement Page.


LAUNCH DATE: 12-Nov-2005
LAUNCH TIME:07:30 am
LAUNCH SITE: Intrado Headquarters (Driving Directions)

EOSS Frequencies:

Global Frequencies

  • Preflight Net:
    • 147.225 MHz 107.2 Hz tone
    • 8:30 PM Night before flight (Time switch, 1/2 hour later than normal)
  • Talk-In to Intrado
    • 147.225 MHz 107.2 Hz tone (tentatively scheduled to start at 6:30 AM)
  • Launch Site Simplex
    • 146.580 MHz
  • Tracking and Recovery Operations
    • 449.450 MHz RMRL Repeater (103.5 Hz Tone)
    • 146.550 MHz simplex (field ops, NOT launch site)
    • Repeater Coverage Pages - Listings of all repeaters available in the expected flight areas.
    • 7.228 MHz + QRM HF (sporadic usage)

Balloon Frequencies

  • Beacon
  • APRS
    • 144.340 MHz (Payload Train)
      • ID: AE�SS-11
      • DIGI: EOSS
      • Node: BALNOD
      • APRS Time Slotted to 0:00 every minute
      • Telemetry Every 2 minutes at 0:00
      • Sample Data
  • ATV
    • 426.250 MHz (AM)
    • ID: AE0SS
    • De-spun ATV package

Flight Systems:

Balloon Manufacturer Kaysam
Balloon Type latex
Balloon Size 3000 gram
Payload 20 lbs.
Free Lift % calculated at fill
Ascent Rate 1000 fpm estimated
Descent Rate 910 fpm estimated
Parachute 10 ft
Peak Altitude determined after flight
Launch Conditions determined at launch


Payload Configuration:

Internet Gateway Stations:

Future I-Gaters:

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

Current I-Gate Station:

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, 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 Info:

Help us build a database of the best RDF/Observation sites in Eastern Colorado. See the Observation Site Database page for ideas on what we'd like to see in this DB and if you're interested in the Balloon Track use of that database.

EOSS Grid:

Grid for November 12, 2005

Location Grid X Grid Y
Last Chance 70 30
Ft. Lupton 5 54
Woodrow 70 47
Franktown 8 6
Launch Point -11.87 57.44
Touchdown 43.4 61.8



Our Customer

Colorado University will be flying several DemoSats.

note: customers are welcome to submit detailed synopses of their flights or web links to their own web sites.

Radio Coverage:

Map made with Radio Mobile Deluxe

This is the approximate coverage for a flight launched from Windsor, Colorado once it reaches 95,000 feet ASL. Red marks a signal below .25 uV