Recap of EOSS-60

Track vs. Prediction

Green = Actual Flight Track
Purple = predicted ascent
Red = predicted descent

Recap Info

Launch Site - Meadow Lake Air
   Launch Point: 38.951� lat.   -104.5757� long.
    Ascent Rate: 1100 feet per minute
   Descent Rate: 1350 feet per minute
       Altitude: 6874 feet

VOR Station - Black Forest (BRK)
       Latitude: 38.9417� lat.  
      Longitude: -104.6333� long.
Magnetic Offset: -10.3� from True Degrees

Predicted Landing Site
  Landing Point: 38.7544� lat.  -104.3124� long.
       Altitude: 6500 feet
    Flight Time: 107 Minutes
        Bearing: 133.7� True
          Range: 19.6 Mi.

Actual Landing Site
  Landing Point: 38.7299� lat.  -104.3492� long.
        Bearing: 141.3� True
          Range: 19.5 Mi.

Difference from Predicted to Actual Landing Site
        Bearing: 229.5� True
          Range: 2.6 Mi.

all values are predicted except for the last two entries

LAUNCH DATE: October 19, 2002
LAUNCH TIME: 09:06 am MDT, 15:06 UTC
LAUNCH SITE: Meadow Lake Airport (Directions)


All Balloon Frequencies Tentative

  • HF Net during Flight
    • 7228 KHz starting at 14:30 UTC (8:30am MDT)
  • Cross Band Repeater
    • Input 445.975 MHz
    • Output 147.555 MHz
      • APRS failed
  • APRS on the stand alone beacon
    • 144.340 MHz
    • ID = W5VSI-11
    • Digi = EOSS60
    • Node = BALNOD
  • Beacon
    • 145.600 MHz
  • ATV
    • 426.250 MHz (AM)
  • Tracking and Recovery Operations
    • 448.450 MHz (100 Hz PL tone) courtesy of PPFMA
    • 146.550 MHz simplex (same simplex for field and launch ops)
  • Simplex at Launch Site
    • 146.550 MHz (same simplex for field and launch ops)

Text Recaps:

(send in your comments)


send in your photos


Cross Band Repeater Log

It's so good, it needs its own page to do it justice

Longest distance QSO

  • Between
    • KC�CNT Mike Doe in Douglas, WY
    • N0KQX Dale Urban in Garden City, KS
  • @ 400 miles
  • 10:23 MDT

Tracking and Recovery Recap:

Here is Paul Ternlund's spread sheet analysis of bearings obtained from the tracking and recovery team on this flight.

Data Files:

The complete ground station log shows all packet activity received at the EOSS ground station at Meadow Lake Airport. This includes digipeated packets from stations other than the balloon payload.

The full KPC3 log shows walking about pre-launch and the payload meandering about post touchdown as well as the brief snippet of a helicopter flight back to the tracking and recovery teams.

Text files:

Spread Sheet files (comma delimited)

Tracking and Recovery
Grid Placement:

Location X coord Y coord
Launch point 33 63.5
Punkin Center 80 55
Colorado Springs 20 55
Burnt Mill 0 21
Karval 89 47
Landing point 55 44



EOSS-60 will be in support of the Jamboree on the Air (JOTA) Boy Scouts of America event. Details will be added as they arrive.

Information is available on the Scout's JOTA Web Page

Here's the Flyer being posted to advertise this event.

Radio Coverage for EOSS-60 Cross Band Repeater

Coverage at 95,000 feet ASL

Light Green - (good packet reception) APRS
Red - The 0.40 uV threshold - voice may be possible outside of this zone but will be noisy

This plot generated by Radio Mobile