EOSS-307 NDIA STEM Flight - Recap

Tom Londrigan (KE7KCK)'s picture
Submitted by Tom Londrigan (... on Wed, 03/17/2021 - 21:55

EOSS 307 was launched as a 3000g balloon from Deer Trail Colorado at 0730 March 20th, and all payloads were recovered approximately 2.5 miles north of Wiladel Colorado.  Achieved a maximum altitude of 104,809 Ft at burst. The Photo below was taken just prior to burst. KEØPAM has produced a 25-minute video located at https://youtu.be/66j1lAMDiPk

Mileage link

 

Recap Gallery: 
Original Announcement: 

Update 3/18/21 1800 EOSS-308 Rev B payload plan posted to correct the Top frequency on KC0D-1

STEM flight sponsored by the Rocky Mountain Chapter of the National Defense Industrial Association. 

Launch will be at 0715

If weather permits, we will fly a single 3000g balloon with EOSS qual payloads added.

If cloud cover precludes a heavy flight, we will launch 2 exempt balloons.

Preflight predictions can be found here.   Live tracking can be seen here.

Event Date: 
Saturday, March 20, 2021 - 00:00
Flight Coordinator: 
KE7KCK
Launch Site: 
Deer Trail
Grid: 
Grid location is Last Chance X 30 Y 30 Grid Test: N 40.000 • W 103.000 X 61.3 Y 47.9 Predict:8 mi S of Heartstrong (NS CR-L & EW CR-18) (X 83.0 Y 36.5)
Flights: 

EOSS-307 Heavy

If Precluded from Launching a Heavy balloon, the flight will be split with the NDIA payloads on the first balloon and EOSS payloads on the second balloon;

EOSS-307 LITE Payload Plan Initial

EOSS-308 LITE Payload Plan Rev B

Balloon Type: 
3000g latex
Parachute: 
12 ft Rocketman Orange/Green
Beacons: 
FrequencyCallsignTypeNotes
145.765KC0D-14APRS/Release/DF
144.340AEØSS-13APRS / Digi Slotted 10/40 Digi EOSSX
144.340AE0SS-12APRS/ DigiQUAL Slotted 24/54 Digi EOSSA
145.645KC0D-2APRS/DigiQUAL EOSSC
Payload Plan: 
PDF icon EOSS 307 Heavy Payload Plan Rev A.pdf
FrequencyList: 

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:
        Repeaters:
        • 449.450 MHz (-5 MHz Offset, 103.5 Hz Tone) RMRL repeater (Assuming we are flying out of Deer Trail).
        • 448.450 MHz (-5 MHz Offset, 100.0 Hz Tone) PPFMA repeater (Assuming we are flying out of Deer Trail).Repeater not available for this flight

        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
BravoW9CN, KD7JNQ, N0JPSMike, Kraig, JohnAlpha Backup
CharlieKD7INQDave
DeltaK0SCC, KE0BMUStephen, WhitneyLaunch then Track
EchoKE7KCKTom, FC
GolfK0BRA, N0RPFDoug, Rob
Ground StationN2XGL, K5JK, NOCALLJeff, Tom, Randy
HotelKB0YRZChris
TangoKC0LJohnPredictions from Texas
IndiaN0NDMLarryLaunch then Track
JulietKD0SEMDave
LimaN6BAJeff
TR Breakfast: 
It will be muddy roads and snow t the recovery site. Bring your boots. The EOSS 307 T&R breakfast will be at the Flying J Truck Stop IHOP in Limon at 6:15 AM. Grid location is Last Chance X 30 Y 30 Grid Test: N 40.000 • W 103.000 X 61.3 Y 47.9 Predict:8 mi S of Heartstrong (NS CR-L & EW CR-18) (X 83.0 Y 36.5)