EOSS-315/316 NDIA STEM Flight & Northrup Grumman Interns - Recap

 EOSS-315 was launched at 0715 10/10/21 from Deer Trail Colorado.  The flight string included 3 payloads from the National Defense Industrial association containing experiments from school students across the country.  It reached a maximum altitude of 93,068 ft.  All payloads were recovered southwest of Lindon, CO at 39.711, -103.474.

EOSS-316 was launched at 0735 10/10/21 from Deer Trail Colorado.  The flight string included 2 payloads with experiments from interns at Northrop Grumman. It reached a maximum altitude of 108,610 ft.  All payloads were recovered south of Last Chance, CO at  39.582, -103.613

 mileage link for club members

Original Announcement: 

Due to weather considerations the flight has shifted to SUNDAY Oct 10th.  Payload plans have been updated.  10/8/21:  Grid changes, added trackers.10/9/21 0900 Revision C payload plans posted to reflect appropriate weights in all places.  Rev C is a WEIGHT ONLY update.  One 1500g balloon carrying NDIA-sponsored STEM exteriments from multiple schools and one 3000g balloon carrying three intern-developed payloads from Northrup Grumman Space Systems.  Flight predictions for these flights can be seen here.  Flight tracking the day of the flight can be found here.

Event Date: 
Saturday, October 9, 2021 - 00:00 to 23:45
Flight Coordinator: 
KE7KCK
Launch Site: 
Grid: 
Courtesy of John, KC0L Last Chance X 50 Y 50 Grid Test: N 40.000 • W 103.000 X 81.3 Y 67.9
Flights: 

EOSS-315

A single 1500 gram balloon with NDIA payloads.

10/9/21 0800 Rev C payload plan updated WEIGHT ONLY.  No other config changes

Balloon Type: 
1500g latex
Parachute: 
12 ft Rocketman Orange/Green
Beacons: 
FrequencyCallsignTypeNotes
144.905 MHzKC0D-3APRS/Release/DFTop - paired with Release Charlie
144.340 MHzAEØSS-12APRS / Digi Slotted 24/54 Digi EOSS A

EOSS-316

A single 3000 gram balloon with 2 northrop grumman payloads.  If the cloud cover is greater than 5/10ths the balloon will have to be split into 2 lite payload balloons

Revision C to payload plans to update WEIGHT ONLY.  No other configurations changed.

EOSS-316 Lite Rev C

EOSS-317 Lite Rev C

 

 

Balloon Type: 
3000g latex
Parachute: 
12 ft Rocketman Orange/Green
Beacons: 
FrequencyCallsignTypeNotes
145.765 MHzKC0D-14APRS/Release/DFTop - paired with Release Adam
144.340 MHzAEØSS-13APRS / Digi Slotted 10/40 Digi EOSSX
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).
        • 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, MarkQual K0SCC-14
EchoN0RPFRobE0SS 316
FoxtrotKE7KCKTomE0SS 316
Ground StationN2XGL-12, K5JKJeff, TomE0SS 315
IndiaK0LOBJimE0SS 315
KiloN0NDMLarryE0SS 316 Launch Team
MikeN0FTISteveE0SS 316
RomeoKC0RPS, W0GVJim, GerryE0SS 315
TangoKC0LJohnFrom Texas E0SS 316
YankeeKE0YALBrad316: Escort Wrangler for NG Students
TR Breakfast: 
TBD: EOSS 315 Predict: 2.5 mi S of Elba (NS CO-63 & EW CR-24) (X 70.4 Y 62.0) EOSS 316 Predict: 6.5 mi E of Last Chance (NS CO-P & EW US-36) (X 56.9 Y 49.9) Weather forecast for Deer Trail at 0700 MDT (1300 UTC) Sunday: Mostly Clear skies, cloud cover 30%, visibility unlimited Temperature 40 dew point 32, wind NW at 5