EOSS-311 Northrup Grumman Space Systems Interns - Recap

KCØRPS's picture
Submitted by KCØRPS on Mon, 07/12/2021 - 11:25

A single 1500g balloon was launched at 0804 MDT on July 24, 2021 from the Limon ball fields. The balloon reached an altitude of 94,228 ft MSL and landed 16.09 miles west of the launch site, north of Matheson, Colorado near the intersection of CR149 and CR102.

mileage link for club members

Flight Summary

EOSS-311	07/24/2021

14:04:19 UTC  Launch 	39.236256	-103.696774
15:10:56 UTC  Burst	39.226211	-103.892250  94.228 K Ft
15:52:53 UTC  Landing	39.232554	-103.997331
Recap Gallery: 
Original Announcement: 
  • 07-15-2021Based on the current predictions, the launch site has been moved to Limon. Later changes may be necessary. Launch is scheduled for 0800.
  • 07-21-2021Revised payload plan, Rev. C
  • 07-23-2021Revised payload plan, Rev. D

Predictions are located here. Scroll down to EOSS-311 and click on GIF for the current launch site.

One 1500g balloon carrying one payload supporting the Northrup Grumman Space Systems Intern Program and three pieces of EOSS equipment for flight qualification

Event Date: 
Saturday, July 24, 2021 - 08:00 to 12:00
Flight Coordinator: 
KCØRPS
Launch Site: 
Limon Softball Fields
Grid: 
Punkin Center  X 60 Y 20 Grid Test: N 39.000 • W 103.000 X 97.5 Y 30.3 Predict: 6 mi N of Ramah (NS CR-101 & EW CR-90) (X 33.4 Y 43.9)
Flights: 

EOSS-311

One 1500g balloon flying one Northrop Grumman Space Systems Intern payload and three pieces of EOSS equipment for flight qualification.

Balloon Type: 
Totex 3000g Laytex
Parachute: 
12 foot Rocketman
Beacons: 
Beacons
FrequencyCallsignTypeNotes
144.340 MHzAE0SS-12APRS/Digi EOSSAPrimary Timeslotted :24 & :54
145.645 MHzKC0D-2Remote Release/DFSecondary with wireless release Adam
144.905 MHzKC0D-3APRS/Digi/Remote ReleasePaired with release Charlie for flight qualification
Payload Plan: 
PDF icon EOSS-311 Lite Rev D.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 Windsor).

        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)

DMR:
RMHAM DMR “Wide" along with EOSS deployable has been approved.  W9CN will have EOSS#1 Deployable repeater operating from his truck.  

2M Direction Finding Frequencies (for this flight):

  • 144.340
  • 144.905
  • 145.645

 

Tactical Calls: 
TacticalCall SignNameNotes
ALPHAWA0GEH. KC0DMarty, Mark
BravoW9CN, N0JPSMike, JohnAlternate Alpha
CharlieKC0RPSJim, Flight Coordinator
DeltaK0SCCStephen
EchoK0BRA, N0RPFDoug, Rob
FoxtrotKE7KCKTom
GolfK0JWB, K0NKKJohn, Nancy
Ground StationK5JK. N0Call, N0NDMTom, Randy, Larry
HotelKB0YRZChris, Jen
IndiaK0LOBJim, Guy
JulietKC0ZIE, WB0DKTDarren, Glenn
TangoKC0LJohn remote from Texas
YankeeKE0YALBradStudent Escort
TR Breakfast: 
Optional Breakfast: Patty Anne's Cafe 230 SH-86 Kiowa CO 80117 United States At 7 AM Grid: Punkin Center X 60 Y 20 Grid Test: N 39.000 • W 103.000 X 97.5 Y 30.3 Predict: 6 mi N of Ramah (NS CR-101 & EW CR-90) (X 33.4 Y 43.9)