EOSS Upcoming Flights
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04/12/2025 - 15:00
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04/19/2025 - 00:00 to 23:45
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05/10/2025 - 00:00 to 23:45
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EOSS-262, 263 Summit Middle School and NSSTI Recap
EOSS-262 with the NSSTI payloads was launched on a 1500g balloon from the Deer Trail, CO high school football field (N 39 ° 36.81', W103° 28.28') at an elevation of 5224 feet. at 8:11 AM MDT. The balloon burst at 9:32 AM at an altitude of 91,366 ft. after an ascent averaging 1135 ft./min. The parachute and flight string touched down at 10:22 AM and was recovered at an elevation of 4705 ft. about 3.5 miles NW of Aroya, CO (N 38° 54.38', W 103° 10.21') after a flight of 2 hours 11 minutes. The touchdown horizontal speed was 21 mph. The straight line distance between launch and touchdown was 67.5 miles.
EOSS-263 with the Summit Middle School payloads was launched on a 1500g balloon from the Deer Trail, CO high school football field (N 39 ° 36.81', W103° 28.28') at an elevation of 5224 feet. at 8:47 AM MDT. The balloon burst at 10:21 AM at an altitude of 72,768 ft. after an ascent averaging 719 ft./min. The parachute and flight string touched down at 11:09 AM and was recovered at an elevation of 4485 ft. about 13.6 miles SW of Kit Carson, CO (N 38° 37.05', W 102° 58.01') after a flight of 2 hours 25 minutes. The touchdown horizontal speed was 20 mph. The straight line distance between launch and touchdown was 90 miles.
Click here:
EOSS Member Mileage Reimbursement for Flight 262 and 263
Recap Gallery:
Original Announcement:
Update 10/20/17 1900: Delay launch until Sunday. High winds Saturday morning will make fill conditions unsafe! We will reschedule to Sunday morning when winds are predicted to be calm. . Preflight net will be held on the 449.225 MHz RMHAM Repeater (141.3 Hz Tone), 8 pm MDT preceding night of flight.This will be a flight of two 1500g balloons flying payloads from NSSTI and Boulder's Summit Middle School. Launch times will be at 0800 and 0820. Preliminary predictions are now being posted with 24 hour updates at this link: www.eoss.org/predict
Event Date:
Saturday, October 21, 2017 - 00:00
Flight Coordinator:
Tom Londrigan KE7KCK
Launch Site:
Grid:
Punkin Center 10,30 Test: N39.000 W103.000 = 47.5, 40.3
Flights:
EOSS-262
This will be a 1500g balloon with 3 payloads from NSSTI
Balloon Type:
Totex 1500g
Parachute:
10 ft Rocketman
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.75 MHz | KC0D-15 | APRS/DF/Cutter | Wireless release |
| 144.34 MHz | AE0SS-12 | APRS/Digi | Path EOSS |
Payload Plan:
EOSS-263
This will be the flight of a 1500g exempt balloon with 7 Summit Middle School payloads.
Balloon Type:
Totex 1500g
Parachute:
8.5 ft with fast release
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.6 MHz | KE0BMV-11 | APRS/DF | |
| 144.34 MHz | AE0SS-13 | APRS |
Payload Plan:
FrequencyList:
Preflight Net:
- 449.225 MHz RMHAM Repeater (141.3 Hz Tone) 8 pm MDT preceding night of flight. Note this Change!!!
- 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the RMHAM machine is down
- 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency
Recovery Operations:
- 448.450 MHz PPFMA (100.0 Hz Tone)
- 446.100 MHz Field Simplex EOSS #262
- 446.150 MHz Field Simplex EOSS #263
- 146.550 MHz Backup field simplex
- 446.275 Drive out simplex
Launch Site Simplex: 446.050 MHz
HF - Possible ops: 7.235 LSB
Tactical Calls:
| Tactical | Call Sign | Name | Notes |
|---|---|---|---|
| Alpha | WAØGEH, KCØD | Mark, Marty | EOSS 262, Tracking Coordinators |
| Bravo | KØLOB | Jim, Julie | EOSS 263 Tracker |
| Charlie | KCØRPS | Jim | EOSS 262 Tracker, Need Navigator |
| Delta | KØSCC, NØLP | Stephen, Nick | EOSS 263 Launch Team, Tracker, |
| Echo | KDØSEM | Dave, Ryan | EOSS 262 Launch Team, tracker |
| Foxtrot | KE7KCK | Tom, Varun | EOSS 263 Flight Coordinator, Need Navigator, |
| Seats needed for CU Students | |||
TR Breakfast:
The predicted trajectory has shifted south for this postponed launch. We will not be going to Akron or using their repeater. Breakfast will be at Denny's in Limon, CO. We will meet at 7:00 and leave by 7:45 for the recovery site. We will stage the students at the southwest corner of Highway 287 and Highway 94. There is a large gravel lot at that site. Prediction is X=47.3, Y=15.9, 15 mi SSE of Aroya and 15 mi SW of Kit Carson. It is about 16 miles SSE of the staging point.