Next Flight

NOAA Temperture Profiler

Flight Profile and Payload Plan have been updated to Rev. B

Flight Coordinator: 
KB0TVJ, Russ
Event Date: 
Saturday, July 18, 2015 (All day)
Launch Site: 


EOSS210 is the third test flight of the NOAA/LASP Optical Fiber Temperature Profiler.  The first flight was EOSS199 in Sept 2014, but the optical fiber broke shortly after launch, so no testing was possible.  The second flight was in March 2015 and was successful.  However, testing time was limited because of the relatively high ascent rate of 1239 ft/min.  See the write-ups of these flights for more information.  The goal of this third flight is to increase testing time by using a relatively slow ascent rate and launching shortly after sunrise of a mid-summer day.

The two previous flights used 3000 gram balloons and gross lift factors of 1.15.  To reduce the ascent rate, this flight will use a gross lift factor of 1.11 which should result in an ascent rate slightly above 600 ft/min.  Using a 2000 gram balloon should result in a maximum altitude of approximately 90,000 feet.  This combination of low ascent rate and relatively low burst height means that the balloon will spend reduced time in the turn around winds reducing the chances of  drifting far enough west to land close to DIA.

The present plan is to launch from Deer Trail, but if wind predictions show that it would be possible to launch from Windsor, the launch will be from there.  The reason for this is that there are minimal obstructions to the east from the Windsor launch site.  That will reduce the chances for a low ascent rate balloon to get caught in light poles that exist around the Deer Trail site.

Balloon Type: 
Hwoyee 2000g
10 ft
147.42 MHzK0SCC-11APRS/Cutter

Preflight Net:

  • 147.225 MHz CRA Repeater (107.2 Hz Tone) 8 pm MDT preceding night
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the CRA machine is down
  • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency

Recovery Operations:

  • 449.450 MHz RMRL (103.5 Hz Tone)
  • 448.225 MHz (141.3 Hz Tone) Testing… PL verified 7/2/14
  • 446.100 MHz Field Simplex
  • 146.550 MHz Backup field simplex

Launch Site Simplex: 146.550 MHz

HF - Possible ops: 7.235 LSB

Tactical Calls: 
TacticalCall SignNameNotes