Flight Recap for EOSS-190

02/24/2014 12:51 (CDT): Prelim Template, Mileage Form

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Mileage Compensation Form

This flight should be a compensated event so fill out the form for your reimbursement

Flight Coordinator: Rob Wright (kc0uuo@eoss.org

LAUNCH DATE: August 3rd, 2013 (wx delay +1 day)
LAUNCH TIME 7:10 am MDT (13:10 UTC)
LAUNCH SITE: Deer Trail, CO (driving directions to Deer Trail Launch Site)  

Pre-flight Prediction and Actual Tracks

E0SS-190 KC0UUO-11

Blue = Actual Track
Green = Predicted Ascent Phase
Red = Predicted Descent Phase

Map made with MapPoint
Prediction made with Balloon Track


Green Track = Ascent
Red Track = Descent (NO DESCENT TRACK)
Prediction and Actual tracks made with Balloon Track

Maps by Google Earth

E0SS-190 K0SCC-11

Blue = Actual Track
Green = Predicted Ascent Phase
Red = Predicted Descent Phase

Map made with MapPoint
Prediction made with Balloon Track


Green Track = Ascent
Red Track = Descent (NO DESCENT TRACK)
Prediction and Actual tracks made with Balloon Track

Maps by Google Earth

Final Pre-Flight Prediction is available here
Prediction History is available here

EOSS Flight Day Frequencies:

Tracking and Recovery Frequencies

Preflight Net:

  • 147.225 MHz (107.2 HZ Tone) CRA Repeater, 8 pm MDT preceding night 
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the CRA machine is down
  • 146.640 MHz will serve as a backup frequency

Tracking and Recovery Operations  

  • Front Range and out east 
    • 449.450 MHz RMRL (103.5 Hz Tone) 
  • Field Simplex Frequencies   
    • 446.100 MHz simplex for field recovery operations
    • 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-190 Balloon Payload Frequencies

  • Beacons
    • 147.420 MHz
      • CW ID: K0SCC
  • APRS
    • 144.340 MHz
      • ID: KC0UUO-11
      • DIGI: EOSS
      • APRS Time Slotted Every 30 seconds at 0:00 and 0:30
    • 147.420 MHz  
      • ID K0SCC-11
      • Slotted at 15 and 45 after the minute

Flight Systems: 


Balloon Manufacturer Totex
Balloon Type latex
Balloon Size 3000 g
Neck Load 21.3  Lbs.
Neck Lift 25.6 Lbs.
Ascent Rate 1329 fpm estimated
Estimated Burst Alt 100,000 ft. ASL
Descent Rate 950 fpm estimated
Parachute 8.5 ft.


Payload Configuration: 

Payload Experiment Designer

SGC Demosats

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

Internet Gateway Stations:

as seen on Findu.Com (listed alphabetically)

EOSS-190, KC0UUO-11

  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • KB0TVJ - Russ Chadwick, Ground Station
  • N0EB-1 - Richard Beggs, Thornton, CO
  • N0IX-12 - Doug Gentges, Mobile
  • N0PSJ - Christopher Holmes, Arvada, CO


EOSS-190, K0SCC-11

  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • K0ANI - Larry Cerney, Denver, CO
  • K0SCC - Steve Meer, Mobile
  • KB0TVJ-4 - Russ Chadwick, Ground Station
  • KC0D-2 - Mark Patton
  • N0IX - Doug Gentges, Littleton, CO
  • N0IX-13 - Doug Gentges, Mobile
  • N0SPB - Shaun Bryant, Commerce City, CO


EOSS wishes to express our sincere appreciation to the stations above who iGated the balloon APRS telemetry onto the internet. Did you know I publish predictions for i-gates? I keep a list of everyone who has ever i-gated an EOSS balloon flight. You're all in the list so if you're wondering when the balloon will pop up over your horizon, check out this page for future flights.  Currently predictions are being made for 30 i-gates.

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 (webmaster@eoss.org) 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 findu.com 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 can often maintain the data flow.

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 or maximum elevation, 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 Operations   


For breakfast, we can convene at/on the bagels in Deer Trail.  Post-flight we can head to Applebee�s north of I-70 and Airport road on East 40th Avenue.  We are seeking Parker�s (Food and Beverage Coordinator) approval.

16485 E 40th Circle, Aurora CO 80011
United States
(303) 371-4114


Tracking and Recovery Grid

TrackPoint Grid Reference Location

Grid X

Grid Y

Last Chance



Grid Test   N 39.450, W103.500



Tactical Call Signs



Call sign





Marty, Mark

Tracking and Recovery Coordinators



Larry, Benjie

Tracking, Recovery



Mike, John, Miles

Tracking, Recovery



Stephen, Whitney, Parker

Tracking, Recovery




Tracking, Recovery



Rob, Doug

Flight Coordinator, Tracking, Recovery



John, Eileen

Tracking, Recovery


KB0YRZ Chris Tracking, Recovery




Colorado Space Grant



Chris Koehler

Colorado Space Grant


Text Recaps



Launch Site

Recovery Operations


recorded by not uploaded




Pre-Flight Prediction Files


Findu Full Packet Log for vicinity of flight


EOSS-190 KC0UUO-11


 Spread Sheets

Mapping Files


EOSS-190 K0SCC-11


 Spread Sheets

Mapping Files