EOSS-325 Metro State University - Intro to Space - Recap

A single 1500g balloon was launched on Sunday April 24, 2022 following a ground-wind launch scrub on the previous day. The balloon carried payloads from Metro State University Denver's Introduction to Space class. The balloon was launched at 0700 MDT and gained an altitude of 93,838 ft. The balloon landed at 0909 MDT a mile south of Lindon, Colorado on Highway 36 east of Last Chance, Colorado.

Original Announcement: 

Update 8 pm 4/20/22:  Launch has shifted to Sunday March 24th due to high winds on Saturday.  Payload plan for 325 Lite Rev A posted.

Due to reduced payloads, this will be One 1500g balloon with Metro State University payloads.


Event Date: 
Sunday, April 24, 2022 - 00:00 to 23:45
Flight Coordinator: 
Launch Site: 


One 1500 gram balloon with Metro-State payloads

Balloon Type: 
1500g Kaymont
12 ft Rocketman
145.645 MHzKC0D-1APRS/DF/Release
144.340 MHzAE0SS-12Bottom APRS BeaconSlotted 24/54
Payload Plan: 

EOSS Preflight Net @ 7 PM Mountain Time preceding night:
        •  449.225 MHz (-5 MHz Offset, 141.3 Hz CTCSS) Rocky Mountain Ham Radio (RMHAM) Repeater and EchoLink *CANONCTY* conference and the Fun Machine linked system
        • 146.940 MHz (-600 KHz Offset, 103.5 Hz CTCSS) Rocky Mountain Radio League (RMRL) Repeater if the RMHAM machine is down
        • 146.640 MHz (-600 KHz Offset, 100.0 Hz CTCSS) Denver Radio League (DRL) Repeater will serve as a backup to the backup repeater 

Launch Site:
        • 446.050 MHz Simplex  
        (Note that some radios assume these are repeater frequencies and attempt to put a 5 MHz offset in the transmit frequency automatically)

Track & Recovery Operations:
        • 449.450 MHz (-5 MHz Offset, 103.5 Hz Tone) RMRL repeater (Assuming we are flying out of Windsor).
        • 448.450 MHz (-5 MHz Offset, 100.0 Hz Tone) PPFMA repeater (Assuming we are flying out of Deer Trail).

        Simplex Frequencies:
        • 446.100 MHz Balloon #1 Field Simplex 
        • 446.150 MHz Balloon #2 Field Simplex
        • 446.200 MHz Balloon #3 Field Simplex
        • 446.275 MHz Car to Car drive out Simplex
        (Note that some radios assume these are repeater frequencies and attempt to put a 5 MHz offset in the transmit frequency automatically)

        Legacy 2M Simplex Frequency (not generally used due to desense/interference issues with the 2M APRS packets)
        • 146.550 MHz Simplex

2M Direction Finding Frequencies:

  • 144.340
  • 144.360
  • 144.905
  • 145.535
  • 145.645
  • 145.710
  • 145.765


Tactical Calls: 
TacticalCall SignNameNotes
AlphaWA0GEH, KC0DMarty, Mark
BravoK0MCW, KC0RPS, W0GVTony, Jim, Gerry
EchoKB0YRZ, N0JPSChris, John
Gound StationN2XGL, K5JK, KB0TVJ
TangoKC0LJohn in Texas