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EOSS-277 COSGC Summer Flight - Recap
One 3000g Heavy balloon was launched on Saturday moring into clear skys. The balloon followed the prediction very closely, and reached an altitude of 100,274 ft when it burst. The flight string landed half way between Limon and Hugo, just east of Highway 287. After a significant time needed to gain authorization to access grazing land, the student teams hiked 1.2 miles in to the landing site to retrieve their payloads. Flight string landed at 39.20558, -103.56191
Launch video is posted on the EOSS youtube channel at EOSS-277 Launch
Recap Gallery:
Original Announcement:
(Friday noon) The Friday prediction has been posted. We are Go For Launch at Deer Trail on Saturday. Cloud predictions remain near the 50% cutoff, so we don't know if it will be one balloon or two.
Payload Plans Revision C (launch readiness review payload masses) have been posted below.
The 24 hour pediction is available at www.eoss.org/predict, and will not be further updated. The predicitons for the two lite balloons (slightly different) are posted as flights 877 and 878 near the bottom of the prediciton page.
MJG: Added Grids, updated Tracker List
Printable list of Tactical Calls (Rev 7) available here
One 3000g balloon or two 1500g balloons if cloudy. Payloads for Colorado Space Grant Consortium colleges:
- Colorado State University
- University of Colorado - Boulder
- Fort Lewis College
- Pueblo Community College
Here is a link, http://wxqa.com/eoss277.html that provides lots of tracking and weather observation data, useful during the balloon flight.
The prediction currently supports a launch from Deer Trail. If the winds shift, Limon Softball Fields is the backup. Watch this website as the week progresses.
Event Date:
Saturday, July 28, 2018 - 00:00
Flight Coordinator:
KCØRPS
Launch Site:
Grid:
Punkin Center 30,10 Test N39.000 W 104.000 Ans: 14.0, 20.2 (same as last week)
Flights:
EOSS-277 Heavy
Single 3000g balloon if cloud cover allows flying a non-exempt balloon.
Balloon Type:
Totex 3000g Latex
Parachute:
12 foot Rocketman
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.765 MHz | KCØD-15 | APRS/DF/Wireless Release | Secondary Beacon |
| 144.340 MHz | AEØSS-13 Lite | APRS/Digi EOSS | Primary Beacon, Timeslotted on 0:10 & 0:40 |
Payload Plan:
EOSS-277 Lite
1500g balloon to fly if cloud cover requires the use of an exempt balloon
Balloon Type:
Totex 1500g Latex
Parachute:
10 foot spherachute with fast release and thermal cutter
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 144.905 MHz | KEØBMV-11 | APRS/DF/Cutter | Secondary Beacon |
| 144.340 MHz | KØSCC-9 | APRS | Primary Beacon, Timeslotted on 0:00 & 0:30 |
Payload Plan:
EOSS-278 Lite
1500g balloon to fly if cloud cover requires the use of an exempt balloon
Balloon Type:
Totex 1500g Latex
Parachute:
12 foot Rocketman
Beacons:
| Frequency | Callsign | Type | Notes |
|---|---|---|---|
| 145.765 MHz | KCØD-15 | APRS/DF/Wireless Release | Secondary Beacon |
| 144.340 MHz | AEØSS-13 Lite | APRS/Digi EOSS | Primary Beacon, Timeslotted on 0:10 & 0:40 |
Payload Plan:
FrequencyList:
Tracking and Recovery is going to test the use of the RMHAM DMR system during recovery. Make sure your radio has Talk Group 720 (Central Region) programmed.
EOSS Preflight Net @ 8 PM MDT preceding night:
• 449.225 MHz (-5 MHz Offset, 141.3 Hz Tone ) RMHAM Repeater
• 146.940 MHz (-600 KHz Offset, 103.5 Hz Tone) RMRL Repeater if the RMHAM machine is down
• 146.640 MHz (-600 KHz Offset, 100.0 Hz Tone) DRL Repeater will serve as a backup to the backup repeater
Launch Site:
• 446.050 MHz Simplex (corrected)
(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 | W9CN, KB0YRZ, N0JPS | Mike, Chris, John | Tracker Coordination |
| Bravo | WA0GEH, KC0D | Marty, Mark, Wyatt, Cash | 00:07, Launch, Tracker |
| Charlie | KC0RPS, W0NFW, KD0WHB | Jim, George, Skyler | 00:12, Flight Coordinator, Tracker |
| Delta | K0SCC, KE0BMU | Stephen, Whitney | 00:17, Launch, Trackers |
| Echo | K0LOB | Jim | 00:22, Downrange, Trackers |
| Foxtrot | N0RPF, N0IX | Rob, Doug | 00:27, Launch, Tracker |
| Golf | NB4V | Braedon | 00:32, Downrange Tracker |
| Hotel | KE7KCK | Tom | 00:37, Launch, Tracker |
| India | KD0SEM, KE0CQQ | Dave, Ryan | 00:42 Tracker |
| Juliet | KE0NDW, KD9KRW, KE0RDL | Anup, Aanshi, Colin | C-Base Tracking Team |
| Kilo | KE0GKI | Bernadette, Sophie | CU COSGC Directors |
| Lima | KE0ORB, N0LP | John, Nick | 00:47 Trackers |
| November | N6BA | Jeff | 00:52 Tracker |
TR Breakfast:
Breakfast will be at the IHOP in the Flying J Travel Center (north of I-70 at the first Limon exit [359]) at 6:00am.
(see link to printable version of the Tactical Calls, above)