EOSS- 281/282 CU Boulder Gateway to Space and DemoSats - Recap

EOSS-281 with ten student Gateway to Space payloads weighting 17.64 pounds, two GPS-equipped radio beacons, and a 10 ft. parachute was launched on a 3000 gram balloon from the Eaton Middle School at the Eaton, CO launch site (N40° 31.75', 104° 43.41') at an elevation of 4963 feet at 06:40 AM MST on Nov. 10, 2018.  Air temperature at launch time was 18°.  The last packet received before balloon burst was at 8:15 AM at an altitude of 109,250 ft. after an ascent averaging 1106 ft./min*.  Both the burst altitude and ascent rate were above average for a 3000g balloon.  The maximum recorded speed was 102 mph at 7:16 AM at an altitude of 42,517 ft. on ascent.  The parachute and flight string touched down at 8:58 AM at N40° 31.59', W104° 43.40' and were recovered at an elevation of 4,842 ft. after a flight lasting 2 hr. and 17.5 min.  The straight line distance between the launch site and touchdown point was 88 miles.  The touchdown point was about 6 miles southeast of the town of Akron, CO (N° 45.93', W102° 47.64').  The flight string touched down with a vertical speed of 529 ft/min and a horizontal speed of 10 miles per hour.

 * The burst altitude of this flight was higher that we've seen in awhile -- a record?  Checking with Rick NØKKZ he pointed us to data he complied on EOSS-99 which flew on Oct. 22, 2005.  It reached at altiude of 113,953 ft.  The flight was specifically flown to try and set a record and used a 3000g balloon and a total payload weight of 5 lbs.  Here's a link:

     http://www.n0kkz.com/oldeoss/ansrecap/ar_100/recap99.htm

and the packet

     "K0ANI-11>BEACON,WIDE1-1,qAS,K0UT:@164028h3954.02N/10409.31WO093/043/A=113953 Ft."  

EOSS-282 with ten student Colorado Space Grant DemoSats payloads weighting 17.64 pounds, two GPS-equipped radio beacons, and a 12 ft. Rocketman parachute was launched on a 3000 gram balloon from the Eaton Midlde School at the in Eaton, CO launch site (N40° 31.75', 104° 43.41') at an elevation of 4963 feet at 06:59 AM MST on Nov. 10, 2018.  Air temperature at launch time was 18°.    The maximum recorded speed was 99 mph which occurred at 7:30 AM at an altitude of 40,048 ft. on ascent and at 9:09 AM at 42,480 ft. on descent.  The parachute and flight string touched down at 9:36AM at N40° 0.69', W102° 53.42' and were recovered at an elevation of 5,036 ft. after a flight lasting 2 hr. and 37 min.  The straight line distance between the launch site and touchdown point was 103 miles.  The touchdown point was about 20 miles southeast of the town of Akron, CO (N° 45.93', W102° 47.64').  The flight string touched down with a vertical speed of 1012 ft/min and a horizontal speed of 14 miles per hour.



  

 EOSS Mileage Linkhttps://goo.gl/forms/1P2ZxeN5YDLFLeoA2   Note to EOSS members: this mileage link is now generic. If you cannot find it for an eligible flight, find the link from a recent flight and use that.

Original Announcement: 

Update 11/8/18 2015: Updated payload plans to Rev A.  Removed digis from 281, Changed payloads on 282 Heavy. 

Update 11/8/18 1430:  The 48 hour predict looks good for Eaton as the launch site, and a promising forecast for 2 Heavy balloons. 

Two 3000g balloons supporting CU Gateway to Space and COSCG colleges.  If there is greater than 5 tenths cloud coverage, this will split into 4 1500g balloons.  Predictions for the flight path can be found here.

EOSS-281 Lite Payload Plan Rev A

EOSS-282 Lite Payload Plan Rev A

EOSS-283 Lite Payload Plan

EOSS-284 Lite Payload Plan

 

Event Date: 
Saturday, November 10, 2018 (All day)
Flight Coordinator: 
KE7KCK
Launch Site: 
Grid: 
Last Chance X=50, Y=40 Test: N 40.000 W 104.000 X=28.6 Y=57.8, Predict: 10 mi SE of Akron, CO (EW CR-32 & NS CR-JJ) (X=76.3,Y=60.0)
Flights: 

EOSS-281

3000g balloon with 10 Gateway to Space Payloads

Beacons: 
FrequencyCallsignTypeNotes
144.905 MHzKE0BMV-11APRS/DF/Cutter
144.340 MHzKC0D-12APRS/DF/Digi

EOSS-282

3000g balloon with 8 COSCG payloads

Balloon Type: 
3000g Kaymont
Parachute: 
10ft Orange White with QR and Cutter
Beacons: 
FrequencyCallsignTypeNotes
145.645 MHzKC0D-1APRS/DF/Cutter
144.340 MHzAE0SS-13APRS/DF/Digi
FrequencyList: 

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  
        (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 or Eaton).
        • 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)

   DMR will be used when we run out of range to communicate between the trackers and the gound station.  There s a new DMR node at Akron.  This is the information regarding the No CO repeaters.  Rocky Mountain Ham Code plug samples can be found at this link:  RMHAM Sample code plugs



2M Direction Finding Frequencies:

  • 144.340
  • 144.360
  • 144.905
  • 145.045
  • 145.535
  • 145.645
  • 145.710
  • 145.765

 

Tactical Calls: 
TacticalCall SignNameNotesDMR
AlphaWAØGEH, KCØDMarty, Mark00:02, #281 Tracking CoordinatorsYes
BravoW9CN, KBØYRZ, NØJPSMike, Chris, John00:07, #281 Trackers, Alternate AlphaYes
CharlieKCØRPS, WØNFWJim, George00:12, #282 Launch, TrackersYes
DeltaKØSCCStephen00:17, #282 Launch, TrackersUnk
EchoKDØSEMDave00:22, #282 Launch, TrackersYes
FoxtrotKE7KCKTom00:27, #282 Launch, TrackersUnk
GolfN6BA, KØLOBJeff, Jim, Jason00:33, #281 TrackerYes
HotelKEØORBJohn, Nancy00:42 #281 TrackerNo
IndiaKEØTJCMichael, Noah, C-Base Team00:47 TrackerNo
JulietKF5UEFJason, SonTrackerNo
Ground StationN2XGLJeffGround Station Operations
TexasKCØL, NØLPJohn, Nick# 282 00:52 TrackerNo
WhiskeyKDØNRYChrisTracker, COSGCUnk
TR Breakfast: 
Weather forecast for Eaton at 0600 MST Sunday: Partly cloudy, cloud cover 50%, Visibility 8 miles,Temperature 23, dew point 10, winds NNW @ 4 mph Breakfast at Limon for trackers approaching from the south, I-Hop, 5:45, leave at 6:45 Breakfast a Ft. Morgan for trackers approaching from the north and west. McDonalds, 5:45