EOSS-351/352/353 Evergreen HS, Westminster HS, & Golden HS Flight - Recap

KCØRPS's picture
Submitted by KCØRPS on Sun, 11/12/2023 - 12:46

On Saturday, December 2, 2023 three 1500g balloons were launched from Deer Trail Colorado, carrying payloads from three Denver area high schools.

  • EOSS-351 - Evergreen High School
    • Lauched at 7:00am
    • Burst at 67,355 feet
    • Landed at 39.7350, -103.2912 (0.3 mi south of HW 36 near CR Y, west of Anton, Colorado)
  • EOSS-352 - Westminster High School and one student payload from Golden High School
    • Launched at 7:23am
    • Burst at 72,421 feet
    • Landed at 39.7375, -103.2233 (400 yards south of HW 36 near CR CC, immediately south of Anton, Colorado)
  • EOSS-353 -  Golden Hiigh School
    • Launched at 7:43am
    • Burst at 72,438 feet
    • Landed at 39.7448, -103.1515 (400 yards north of CR 12 between CR FF and CR GG, east of Anton, Colorado).

All teams were able to observe the parachute landing of their respective payload string.

   Link for EOSS member mileage reimbursement

Recap Gallery: 
Original Announcement: 

Revision C shows that the payloads will be carried on either two Heavy or three Lite balloons, depending on the cloud cover. The school payloads are separated as follows:

  • EOSS-351 Heavy -- Golden High School
  • EOSS-352 Heavy -- Evergreen High School & Westminster High School
  • EOSS-351 Lite -- Evergreen High School
  • EOSS-352 Lite -- Westminster High School
  • EOSS-353 Lite -- Golden High School.

Two 3000g balloons, or four 1500g balloons carrying student-built payloads from STEM, Aerospace Engineering, and Engineering classes at local High Schools.

Flight Prediction

  • 11-07-2023Payload Plans Rev A posted 
  • 11-30-2023Payload Plans Rev B posted
  • 12-01-2023Payload Plans Rev C posted

In case of excessive cloud cover, the flight will be separated into three balloons as follows:

Event Date: 
Saturday, December 2, 2023 - 00:00 to 23:45
Flight Coordinator: 
KC0RPS
Launch Site: 
Deer Trail
Grid: 
Punkin Center X 30 Y 20, Test: N 39.00 • W 103.00 67.5 Y 30.3
Flights: 

EOSS-351 Heavy

A 3000g balloon carrying student-built payloads from Evergreen High School and Westminster High School.

Balloon Type: 
Totex 3000g Latex
Parachute: 
12 ft Rocketman with Remote Release Adam
Beacons: 
Beacons
FrequencyCallsignTypeNotes
144.905 MHzKC0D-2Remote Release/DFSecondary Beacon
145.710 MHzAE0SS-1Remote Release/DFTethered wireless release qualification
144.340 MHzAE0SS-12APRS/Digi EOSSAPrimary Beacon Timeslotted 0:27 & 0:57
Payload Plan: 
PDF icon EOSS-351 Heavy Rev C.pdf

EOSS-352 Heavy

A 3000g balloon carrying student-built payloads from Golden High School and Westminster High School.

Balloon Type: 
Totex 3000g Latex
Parachute: 
12 ft Rocketman with Remote Release Baker
Beacons: 
Beacons
FrequencyCallsignTypeNotes
145.645 MHzKC0D-1Remote Release/DFSecondary Beacon
144.340 MHzKC0D-3APRS/Digi EOSSCPrimary Beacon Timeslotted 0:10 & 0:40
Payload Plan: 
PDF icon EOSS-352 Heavy Rev C.pdf
FrequencyList: 

EOSS Preflight Net @ 7 PM Mountain Time preceding night:
        •  449.225 MHz (-5 MHz Offset, 141.3 Hz CTCSS) Rocky Mountain Ham Radio (RMHAM) Repeater and EchoLink *CANONCTY* conference and the Fun Machine linked system
        • 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 

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:
        • Primary FM Repeater - 449.450 MHz (-5 MHz Offset, 103.5 Hz Tone) 

        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)

Skyhub links to primary FM repeater (449.450 MHz):

  • Limon (Cedar Point) - 447.650(-) MHz, 103.5 Hz
  • Hugo - 447.150(-) MHz, 103.5 Hz
  • Firstview - 447.600(-) MHz, 103.5 Hz

 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).

2M Direction Finding Frequencies:

    • 144.340
    • 144.360
    • 144.905
    • 145.535
    • 145.645
    • 145.710
    • 145.765
Tactical Calls: 
TacticalCall SignNameNotes
AlphaW9CN, NØJPSMike, John
BravoN0ØRPF, KØBRARob, Doug
CharlieKCØRPSJimFC
EchoKBØYRZChris
FoxtrotN6BAJeff
Ground StationN2XGL, K5JK. Randy, RussJeff, Tom
GolfKEØUWCGlenn, John
TangoKCØLJohnRemote, Tesas
YankeeKEØYALBrad
JulietKFØNLQAnn
IndiaKØNKKNancy
KiloKFØOGS, K5CFRWes, CharlieCU ARC
TR Breakfast: 
Update: IHop, Limon, 6:00, Optional