EOSS-310 Gateway to Space - Recap

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Submitted by KCØRPS on Mon, 04/12/2021 - 11:01

A single 3000g balloon was launched on Sunday April 18, 2021 at 6:54am MDT with six CU Boulder Gateway to Space payloads. The balloon reported a maximum altitude of 105,741 ft (32.23 km) and the payloads landed 2.63 miles out in a field south of Arriba, Colorado at 9:02am MDT at 39.236333, -103.189722. A combination of four-wheel drive and muddy hiking (see pictures) was necessary to recover the payloads. Because of the day change, Eaton Middle School was not able to participate.

Launch: 12:54:15 UTC
Burst:  14:18:15 UTC Altitude 105,741 Ft
Landed: 15:02:15 UTC 39.238333,-103.189722

mileage link

Recap Gallery: 
Original Announcement: 

We are GO for an 0700 Sunday lauanch from DEER TRAIL, COLORADO (see the launch site link here or below for directions). This will result in safer roads for Tracking and Recovery.

  • 04-09-2021Payload Plans Rev A posted
  • 04-13-2021Comms Plan has been updated
  • 04-13-2021Launch Site Directions updated
  • 04-15-2021Payload Plans Rev B posted
  • 04-15-2021Date and Launch location changed; Payload Plans Rev C posted
  • 04-16-2021Payload Plans Rev D posted

Payloads:

  • CU Boulder Gateway to Space program - 6 payloads
  • Eaton Middle School Science Program (payload canceled)

One 3000g or two 1500g balloons. If two Lite balloons are flown, the payload plans are shown below:

Predictions are available here. Please see the launch site page for maps and instructions. Note that it takes 1:20 minutes from Boulder to reach Eaton (not counting the speed traps).

Event Date: 
Sunday, April 18, 2021 - 00:00 to 23:45
Flight Coordinator: 
KCØRPS
Launch Site: 
Deer Trail
Grid: 
Grid location is Punkin Center X 20 Y 30 Grid Test: N 39.000 • W 103.000 X 57.5 Y 40.3 310 Predict: 9 mi NE of Arriba (NS CR-2 & EW CR-AA) (X 51.1 Y 65.1) Lite Predicts: 2.5 mi NE of Arriba (NS CR-45 & EW CR-3J) (X 45.2 Y 60
Flights: 

EOSS-310 Heavy

One 3000g balloon carrying CU-Boulder Gateway to Space BalloonSats and Eaton Middle School Science payloads

Balloon Type: 
Totex 3000g Latex
Parachute: 
12' Rocketman
Beacons: 
FrequencyCallsignTypeNotes
144.340 MHzAE0SS-12APRS / Digi EOSSAPrimary Beacon, Time slotted at 0:24 and 0:54
144.905KC0D-3Remote Release / DFSecondary Beacon, paired with release Charlie
Payload Plan: 
PDF icon EOSS-310 Heavy Rev D.pdf
FrequencyList: 

A big thank you to the resource trustees for letting us use their systems.

EOSS Preflight Net @ 7 PM Mountain Time, on the preceding night:
        •  Confirmed the 449.225 minus offset with a 141.3 Hz tone "Fun Machine” Node 1961 for the EOSS 310 Saturday the 17th Pre-Flight Net at 7 PM.

 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:
        • Confirmed, the 449.450 MHz (-5 MHz Offset, 103.5 Hz Tone) RMRL repeater for use on Sunday
 
DMR:
RMHAM DMR “Rocky Mountain Wide" along with EOSS deployable(s) have been approved for all flights.  We will be using “Rocky Mountain Wide” talk group (TG 700).  Zone will be “Central East”  Thanks to RMHAM for the use of the RMHAM DMR system!

 NOTE: Code plugs need to be updated.

 The Usual EOSS Simplex Frequencies (UESF) will be used:

  • Ground Station                                               446.050
  • Balloon #1 EOSS 310 T&R                              446.100
  • Balloon #2 Spare                                            446.150
  • Balloon #3 Spare                                            446.200
  • Car to Car drive out                                         446.275 

2M Direction Finding Frequencies for this flight:

  • 144.905
  • 145.765

 

Tactical Calls: 
TacticalCall SignNameNotes
ALPHAW9CN, KE7KCKMike, Tom
BravoK0RPF, KE0ZJVRob, Matt
CharlieKC0RPSJim, Flight Coordinator
DeltaK0SCCStephen
EchoKE7KCKTom, President
KB0UBZ, KA0ZFIBen, Annnot available
Ground StationN2XGL, NOCALLJeff, Randy
HotelKB0YRZChris, Jen
IndiaN0NDMLarry
N6BAJeffNot Available
KE0YALBradNot Available
WA0GEH, KC0DMarty, MarkNot Available
FoxtrotKE0ZJVMatt, CU Sponsor
TR Breakfast: 
0700 Launch Time: 6:00 breakfast at I-Hop in the Flying-J at Limon. Grid location is Punkin Center X 20 Y 30 Grid Test: N 39.000 • W 103.000 X 57.5 Y 40.3 310 Predict: 9 mi NE of Arriba (NS CR-2 & EW CR-AA) (X 51.1 Y 65.1) Lite Predicts: 2.5 mi NE of Arriba (NS CR-45 & EW CR-3J) (X 45.2 Y 60.7) Weather forecast for Deer Trail at 0700 MDT (1300 UTC) Sunday: Sunny skies, cloud cover 20%, visibility unlimited Temperature 29, dew point 17, wind S at 1 Gusts 6 Weather forecast for Deer Trail at 0700 MDT (1300 UTC) Sunday: Sunny skies, cloud cover <10%, visibility unlimited Temperature 27, dew point 18, wind W at 9 Muddy Roads, be careful.