EOSS Upcoming Flights
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10/19/2024 - 00:00 to 23:45
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11/02/2024 - 00:00 to 23:45
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11/09/2024 - 00:00 to 23:45
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11/16/2024 - 00:00 to 23:45
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12/07/2024 - 00:00 to 23:45
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03/22/2025 - 00:00 to 23:45
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04/05/2025 - 00:00 to 23:45
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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-358 & 359 EPIC Littleton & Colorado Space Grant Consortium Flight - Recap
Summary: Two balloons were launched on Saturday, May 4 from Deer Trail Colorado.
- The first balloon, EOSS-358 was an Exempt Payload string under a 1500g balloon carrying Student-built DemoSats from Colorado Space Grant Consortium schools. It reached an altitude of 89,485 feet and landed at 39.819, -102.984, 13.5 miles northeast of Anton, Colorado.
- The second balloon, EOSS-359, was a Non-exempt payload string under a 3000g balloon carrying BalloonSats built by Littleton EPIC program students. It reached an altitude of 101,911 feet and landed at 39.78063, -103.16237, 4.0 miles northeast of Anton, Colorado.
More summary information to follow.
Link for EOSS mileage reimbursement https://forms.gle/qJjy47iTHF5ywDPJ6
Recap Gallery:
Original Announcement:
- 05-02-2024Payload Plans Rev D uploaded to this website
- 04-28-2024Payload Plans Rev C uploaded to this website
- 04-27-2024Payload Plans Rev B uploaded to this website
- 03-05-2024Payload Plans Rev A uploaded to this website
Flight Predictions are available at: https://www.eoss.org/predict/
This is one 1500g balloon and one 3000g balloon or three 1500g balloons carrying student-built payloads from Littleton's EPIC Aerospace program and Colorado Space Grant Consortium from the flight that was canceled because of weather on April 20/21.
In case of clouds, the Heavy payload string will be split into two Lite balloons as follows:
Event Date:
Saturday, May 4, 2024 - 00:00 to 23:45
Flight Coordinator:
KCØRPS
Launch Site:
Flights:
EOSS-359 Heavy
This is a 3000g balloon carrying student-built payloads for the Littleton EPIC Aeorspace program.
Balloon Type:
Totes 3000g Latex
Parachute:
12 ft Rocketman with Remote Release Baker
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 144.905 MHz | KC0D-1 | DF Beacon/Remote Release | Secondary Beacon |
| 144.340 MHz | AE0SS-3 | APRS/Digipeater Alias = "AEØSS-3" | Primary Beacon, time slotted at 0:01 & 0:31 |
Payload Plan:
EOSS-358
This is a 1500g balloon carrying four Colorado Space Grant Consortium student-built payloads and possibly an imaging payload from COSGC.This is an Exempt (Lite) payload string.
Balloon Type:
Totex 1500g Latex
Parachute:
12 ft Rocketman with Remote Release Charlie
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 146.710 MHz | KCØD-3 | Remote Release/DF | Secondary Beacon |
| 144.340 MHz | AEØSS-4 | APRS/Digi Alias = "VOYA" | Primary Beacon Timeslotted 0:21 & 0:51 |
Payload Plan:
FrequencyList:
EOSS Preflight Net @ 7 PM Mountain Time the preceding night:
The preflight net is hosted on the Fun Machine linked system https://www.we0fun.com/
EchoLink *CANONCTY* conference and on the TGIF DMR Network Node: 1997 Talkgroup 815
Denver area Frequencies:
- 449.225 MHz (-5 MHz Offset, 141.3 Hz CTCSS) Mt Thorodin
- 448.150 MHz (-5 MHz Offset, 141.3 Hz CTCSS) DIA
- 449.975 Mhz (-5 MHz Offset, 100 Hz CTCSS) Westcreek
- 447.525 MHz (-5 MHz Offset, 146.2 Hz CTCSS) Devils Head
Back up Pre Flight Net Frequincies
• 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, KFØPCW | Marty, Doug | |
| Bravo | N6BA | Jeff D | |
| Charlie | KCØRPS | Jim | Flight Coordinator |
| Delta | KØSCC, KØBRA | Sephen, Doug G | Post Launch |
| Echo | KØNKK,KLØNLQ, | Nancy,Anne, | Post Launch |
| Kilo | KLØNLQ, KE0UWC | Glenn | Post Launch |
| Golf | NØNDM | Larry | Post Launch |
| Ground Station | N2XGL | Jeff S, Randy | |
| Yankee | KEØYAL | Brad | |
| Hotel | |||
| Zulu | CU | ||
| Kilo | |||
| Lima | KB0YRZ | Chris, Jen | Saturday Only |
| Mike | KE0GKI | Bernadette (CU) | |
| November | KD0NKE | Katie Rae (EPIC) |
TR Breakfast:
Limon I-HOP, 0600, Optional