Flight Recap for EOSS-194/195

06/06/2014 11:49 (CDT): Preliminary recap form. Mileage compensation form linked

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Mileage Compensation Form

mile194_195.htm -Reimbursment form for this flight

Flight Coordinator: Rob Wright

LAUNCH DATE: April 12th, 2014 (wx delay +1 day)
LAUNCH TIME EOSS-194: 06:50 am MDT (12:50 UTC)
LAUNCH TIME EOSS-195: 07:10 am MDT (13:10 UTC)
LAUNCH SITE: Eaton, CO (Driving Directions to Windsor Launch Site)

Pre-flight Prediction and Actual Tracks

E0SS-194 AE0SS-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

Launch Site - Eaton Schools
Launch Point: 40.52696� lat.   -104.72327� long.
Grid: X=-7.86 Y=35.25
Ascent Rate: 1329 feet per minute
Descent Rate: 1000 feet per minute
Altitude: 4835 feet
Maximums Enroute
Distance to LOS: 408.4 Mi.
Maximum Range: 46.3 Mi.
Maximum Winds: 41.0 mph from 274� at 53,245 feet altitude
Burst Data
Burst Point: 40.5217� lat.  -104.15061� long.
Grid: X=22.2 Y=34.9
Burst Time: 87.4 minutes
Burst Altitude: 97,000 feet
Burst Bearing: 90.5�
Burst Range: 30.1 Mi.
Predicted Landing Site
Landing Point: 40.53217� lat.  -103.84141� long.
Grid: X=38.4 Y=35.6
Altitude: 4589 feet
Flight Time: 127 Minutes
Bearing: 89.3� True
Range: 46.3 Mi.
Actual Landing Site
Landing Point: 40.56771� lat.  -104.02601� long.
Grid: X=28.7 Y=38.1
Bearing: 85.4� True
Range: 36.692 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 284.3� True
Range: 9.991 Mi.

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)  Primary
    • 145.295 MHz (100.0 Hz Tone)  Sterling Repeater 1st Backup
    • 145.400 MHz (123.0 Hz Tone) Colorado Connection 2nd Backup
    • 145.310 MHz (123.0 Hz Tone) Colorado Connection Front Range connection link near launch site
  • Field Simplex Frequencies   
    • 446.100 MHz simplex for field recovery operations of EOSS-194
    • 446.150 MHz simplex for field recovery operations of EOSS-195
    • 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
    • AE0SS-2 voice callsign
      • 146.550 MHz
  • HF - Possible ops
    • 7.235 LSB


EOSS-194 Balloon Payload Frequencies

  • Beacons
    • 147.555 MHz
      • CW ID: W5VSI
  • APRS
    • 144.340 MHz
      • ID: AE�SS-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
  • 445.975 MHz
  • ID N0IX-11

EOSS-195 Balloon Payload Frequncies

  • Beacons
  • 147.420 MHz
  • ID: K0SCC-11
  • APRS
  • 144.340 MHz
  • ID: KC0UUO-11
  • APRS Time Slotted Every 30 seconds at 0:15 and 0:45
  • power up at 13 seconds past the GPS minute to properly slot telemetry
  • Telemetry once a minute
  • 147.420
  • ID: K0SCC-11


Flight Systems:   


Balloon Manufacturer Totex
Balloon Type latex
Balloon Size 3000 g
Neck Load 25.5  Lbs.
Neck Lift 30.3 Lbs.
Ascent Rate 1329 fpm estimated
Estimated Burst Alt 97,000 ft. ASL
Descent Rate 950 fpm estimated
Parachute 8.5 ft.



Balloon Manufacturer Totex
Balloon Type latex
Balloon Size 3000 g
Neck Load 24.7  Lbs.
Neck Lift 29.4 Lbs.
Ascent Rate 1329 fpm estimated
Estimated Burst Alt 98,000 ft. ASL
Descent Rate 950 fpm estimated
Parachute 10 ft.


Payload Configuration:

Payload Experiment Designer

CU 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)


  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • KC0D-2 - Mark Patton
  • KC0UUO - Rob Wright - EOSS Trackers Mobile iGate
  • N0EB - Richard Beggs, Thornton, CO
  • N0IX-13 - Doug Gentges, EOSS Trackers Mobile iGate
  • N0SPB - Shaun Bryant, Commerce City, CO


  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • N0IX-12 - Doug Gentges, EOSS Trackers Mobile iGate
  • N0SPB-10 - Shaun Bryant, Commerce City, CO

EOSS-195, KC0UUO-11

  • KC0D-2 - Mark Patton
  • N0EB - Richard Beggs, Thornton, CO
  • N0IX-13 - Doug Gentges, EOSS Trackers Mobile iGate
  • N0SPB - Shaun Bryant, Commerce City, CO
  • W9CN - Mike Pappas

EOSS-195, K0SCC-11

  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • KB0TVJ-4 - Russ Chadwick
  • N0SPB-10 - 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 


At McDonalds in Ft Morgan, CO at 05:45 MDT


Tracking and Recovery Grid 

TrackPoint Reference Location

Grid X

Grid Y

Highway 71 and 14 (west intersection)



Grid Test   N40.500 , W104.500



Please make sure if you are running TrackPoint that you have �Eaton� as the launch site. If you need the information The format for this is   


 (no spaces) you should be able to copy and paste into note pad window in the launch site tab.  


Tactical Call Signs

  Tactical Call sign Name Notes
Alpha KB0YRZ, WG0E Chris, Colin Tracking and Recovery Coordinators
Bravo W9CN, N0JPS Mike, John Tracking, Recovery
Charlie KE7KCK Tom Tracking, Recovery
Delta K0SCC Stephen, Parker Tracking, Recovery (Start at Launch)
Echo KD0SEM Dave Tracking, Recovery
Foxtrot WA9WWS, KD0OXS Don, Dan Tracking, Recovery (HF)
Golf KC0RPS, W0NFW Jim, George Tracking, Recovery
Hotel KC0UUO, N0IX Rob, Doug Tracking, Recovery (Start at Launch)
India N0NDM, W0CBH Larry, Benjie Launch, Tracking, Recovery

Text Recaps



Launch Site

Landing Sequence

Recovery Operations


recorded by not uploaded




Pre-Flight Prediction Files


Findu Full Packet Log for vicinity of flight


EOSS-194 AE0SS-11


 Spread Sheets

Mapping Files


EOSS-194 N0IX-11


EOSS-195 KC0UUO-11


EOSS-195 K0SCC-11