Recap of EOSS-93/94/95

LAUNCH DATE: 16-Jul-2005
LAUNCH SITE: Deer Trail, CO (directions)

EOSS Frequencies:

Global Frequencies

  • Preflight Net:
    • 147.225 MHz 107.2 Hz tone
  • Tracking and Recovery Operations
    • Repeater Selection depends on Predicted Track
    • 448.450 MHz PPFMA Repeater (100 Hz Tone)
    • 449.450 MHz RMRL Repeater (103.5 Hz Tone)
    • 146.550 MHz simplex (same simplex for field and launch ops)
    • 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
    • 7.228 MHz + QRM HF (sporadic usage)

Payload Configuration:

Data for Each Balloon System

See the recap maps, and download the data files for each flight from these links:




Pictures and other information will be posted below as it arrives.

Internet Gateway Stations:

as seen on Findu.Com

For EOSS-093 (AE0SS-11)

  • K0ANI - Larry Cerney
  • K0YG-7 - Mark Patton
  • KC0CAT - Gerry Singer
  • KC0LNO - Michael M Skinner

For EOSS-094 (KE7BBC-11)

  • KC0LNO - Michael M Skinner

For EOSS-094 (KE7BBC-12)

  • K0YG-7 - Mark Patton
  • K0AEM-1 - Richard Beggs

For EOSS-095 (K0YUK-11)

  • K0ANI - Larry Cerney
  • K0YG-7 - Mark Patton
  • KC0CAT - Gerry Singer
  • KC0LNO - Michael M Skinner

For EOSS-095 (K0ANI-11)

  • no stations heard on findu, only the EOSS ground station had any data for this bird

EOSS wishes to express our sincere appreciation to the stations above who iGated the balloon APRS telemetry onto the internet.

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 maintain the data flow quite nicely.

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, 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 July 16, 2005

Location Grid X Grid Y
Last Chance 55.10 62.30
Limon 50 30
Elizabeth 2 36.9
Strasburg 69 20
Anton 75 63
Launch Point 31.32 53.37
Touchdown 39.9 29.1




Recovery Area by Jim Gifford, K0LOB


Landing by K. Mark Caviezel, NG0X


none at present


Our Customer

CU Upward Bound Program, CSU SGC StudentSat 4 Workshop

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