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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
Recap Gallery:
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:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 144.905 MHz | KC0D-3 | APRS/Release/DF | Top - paired with Release Charlie |
| 144.340 MHz | AEØSS-12 | APRS / Digi | Slotted 24/54 Digi EOSS A |
Payload Plan:
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.
Balloon Type:
3000g latex
Parachute:
12 ft Rocketman Orange/Green
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.765 MHz | KC0D-14 | APRS/Release/DF | Top - paired with Release Adam |
| 144.340 MHz | AEØSS-13 | APRS / Digi | Slotted 10/40 Digi EOSSX |
Payload Plan:
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:
| Tactical | Call Sign | Name | Notes |
|---|---|---|---|
| Alpha | WA0GEH, KC0D | Marty, Mark | Qual K0SCC-14 |
| Echo | N0RPF | Rob | E0SS 316 |
| Foxtrot | KE7KCK | Tom | E0SS 316 |
| Ground Station | N2XGL-12, K5JK | Jeff, Tom | E0SS 315 |
| India | K0LOB | Jim | E0SS 315 |
| Kilo | N0NDM | Larry | E0SS 316 Launch Team |
| Mike | N0FTI | Steve | E0SS 316 |
| Romeo | KC0RPS, W0GV | Jim, Gerry | E0SS 315 |
| Tango | KC0L | John | From Texas E0SS 316 |
| Yankee | KE0YAL | Brad | 316: 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