EOSS Upcoming Flights
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04/19/2025 - 00:00 to 23:45
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08/02/2025 - 00:00 to 23:45
EOSS-347 NDIA Flight - Recap
A single 1500g balloon was launched at 8:07 am MDT on October 21, 2023 from Deer Trail School carrying student expreiments from a variety of schools. The balloon reached a height of approximately 86,000 feet and landed south of Arickaree, Colorado.
Link for EOSS member mileage reimbursement
Recap Gallery:
Original Announcement:
One 1500g balloon carrying student payloads sponsored by NDIA
- 10-5-2022Payload Plan Rev B posted
- 10-17-2022Payload Plan Rev C posted
Event Date:
Saturday, October 21, 2023 - 00:00 to 23:45
Flight Coordinator:
KCØRPS
Launch Site:
Flights:
EOSS-347
This balloon will fly exempt and be cut down at 91 kft.
Balloon Type:
Totex 1500g Latex
Parachute:
12 ft Rocketman with Remote Release Baker
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.645 MHz | KC0D-1 | Remote Release/DF | TOP beacon |
| 145.535 MHz | AE0SS-2 | APRS/DF | Firmware Qualification |
| 144.340 MHz | AE0SS-13 | APRS/Digi | BOTTOM beacon, timeslotted :10 & :40 |
Payload Plan:
FrequencyList:
EOSS Preflight Net @ 7 PM Mountain Time the 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
Flight Day:
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
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)
Digital Mobile Radio (DMR):
The decision as to which talkgroup use will be made by the EOSS RF Coordinator on a per flight basis.
- Rocky Mountain Wide Network – Talk Group 700 - Rocky Mountain Ham Radio has approval to the use "Wide" for flight operations.
- Central Colorado Regional Network – Talk Group 720 - On occasion, EOSS may use the Central Colorado Regional Network (Talk Group 720).
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 | WAØGEH, KØNKK | Marty, Nancy | |
| Bravo | KCØRPS, W0GV | Jim, Gerry | Flight Controller |
| Charlie | NØRPF, KØBRA | Rob, Doug | |
| Delta | Reserved | ||
| Echo | KBØYRZ | Chris | |
| Foxtrot | N6BA | Jeff | |
| Golf | NØNDM | Larry | |
| Hotel | KFØNLQ | Ann | |
| India | KEØUWC | Glenn | |
| Yankee | KE0YAL | Brad | Welcome Back |
| Ground Station | N2XGL, N5JK, KB0TVJ, N0CALL | Jeff, Tom,Russ, Randy |
TR Breakfast:
Launch Time: 0800 MDT
Optional Breakfast at I-Hop, Limon, 7:00