EOSS-332/333/334 Evergreen HS, Golden HS, & Westminster HS - Recap

Three exempt (small) balloons were launched from Deer Trail, Colorado on Saturday, January 14, 2023. The balloons landed near Cope, Colorado.

  • EOSS-332 -- Evergreen High School - STEM Capstone course
    • Launched at 7:16am
    • Reached an altitude of 95,351 ft
    • Landed 70 miles downrange
    • Flight path shown here
  • EOSS-333 -- Westminster High School - Aerospace Engineering courses
    • Launched at 7:34am
    • Reached an altitude of 92,222 ft
    • Landed 63 miles downrange
    • Flight path shown here
  • EOSS-334 -- Golden High School - Engineering II class
    • Launched at 8:09am
    • Reached an altitude of 86,211 ft
    • Landed 76 miles downrange
    • Flight path shown here


New mileage form for EOSS members - https://forms.gle/qJjy47iTHF5ywDPJ6


Original Announcement: 

01-12-2023We are ready to go. Payload Plan Rev. G are curent and posted. Please look at predictions 732, 733, and 734 (located at upper right of prediction page.

01-03-2023A new flight date of Saturday January 14th is planned. Think positive thoughts!  Deer Trail is the selected launch site. 7:15am launch time. Payloads onsite two hours early! Payload plans have been updated.

12-14-2022The flight has been scrubbed because of winter weather conditions. A new date will be determined.

12-14-2022Final Payload Plans Rev. F have been posted

12-10-2022Deer Trail has been confirmed as the launch site. A later sunrise has pushed the initial launch to 7:15am. Payload Plans Rev. E have been posted

12-07-2022 The flight originally scheduled for December 2 flight has been rescheduled for Saturday December 17th. The launch site will at be Deer Trail, and has been verified. 

 This is a rescheduled Saturday launch of two Heavy balloons (or three Lite balloons) carrying student-built payloads from:

  • Evergreen High School - STEM Capstone course
  • Golden High School - Engineering II class
  • Westminster High School - Aerospace Engineering course

In case of cloudcovered skys (greater than 5/10ths), we will fly three 1500g balloons as follows:

Flight predictions can be viewed here (select the correct date and launch site (Deer Trail) and view the data. This prediction will start updating daily 15 days before the flight.

Event Date: 
Saturday, January 14, 2023 - 00:00 to 23:45
Flight Coordinator: 
Launch Site: 
Punkin Center: X 10, Y 30. Grid Test: N 39.00, W 103.00 gives you: X 47.5, Y 40.3


This 3000g balloon will carry payloads built by students from Everygreen High School and Golden High School

Balloon Type: 
Totex 3000g Latex
10 foot Rocketman
144.905 MHzKC0D-14Remote Release/DFSecondary Beacon
144.340 MHzAE0SS-12APRS/Digi EOSSAPrimary Beacon, Timeslotted 0:27 and 0:57
Payload Plan: 


This 3000g balloon will carry payloads built by students from Westminster High School.

Balloon Type: 
Totex 3000g Latex
10 foot Rocketman
145.645 MHzKC0D-1Remote Release/DFSecondary Beacon
144.340 MHzAE0SS-13APRS/Digi EOSSPrimary Beacon, Timeslotted 0:07 & 0:37
Payload Plan: 


The following RF Resources have been approved for EOSS-332/333 flight on SATURDAY 14JAN2023.

Preflight Net:

449.225 minus offset with a 141.3 Hz tone "Fun Machine” for the EOSS 332/333/334 Pre-Flight Net on Friday 13JAN2023 @ 19:00 (7 PM).

Analog T&R Repeater:

RMRL 449.450 minus offset with 103.5 Hz tone for Saturday along with links to several other sites. SkyHub Link System will graciously link the following repeaters to this machine during the flight:

  • Limon (Cedar Point) - 447.650(-) MHz, 103.5 Hz
  • Hugo - 447.150(-) MHz, 103.5 Hz
  • Firstview - 447.600(-) MHz, 103.5 Hz
  • Akron - 447.425(-) MHz, 103.5 Hz
  • Stratton - 146.895(-) MHz, 103.5 Hz

RMHAM DMR has been approved using the “Rocky Mountain Wide” talk group. 


RMHAM has added the following DMR sites:

  • Burlington Colorado RMHAM-N0SZ Input 440.0500 MHz Output 445.0500 MHz Color Code 6,  TS-1 TG 700 (Wide), TS-2 TG 720 (Central)
  • Limon Colorado RMHAM-N0SZ Input 440.275 MHz Output 445.275 MHz Color Code 7, TS-1 TG 700 (Wide), TS-2 TG 720 (Central)

 These two sites provide almost full coverage along the I-70 corridor from Byers to Goodland Kansas.

 Updated code plugs are available on the RMHAM website.

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

  • Ground Station                           446.050
  • Balloon 332 T&R                      446.100
  • Balloon 333 T&R                      446.150
  • Balloon 334 T&R                      446.200
  • Car to Car drive out                   446.275 

 Please contact W9CN if you have any questions.

2M Direction Finding Frequencies:

  • 144.340
  • 144.905
  • 145.535
  • 145.645


Tactical Calls: 
TacticalCall SignNameNotes
AlphaWA0GEH, KE0ZJPMarty, Tiffany
BravoW9CN, N0JPSMike, John
CharlieKC0RPS, W0GVJim, Gerry
DeltaK0SCC, KE0BMVStephen, Parker
Ground StationN2XGL, K5JK, KB0TVJJeff, Tom, Russ, Randy
Ground StationN2XGL, K5JK, KB0TVJJeff, Tom, Randy, Russ (Remote)
TangoKC0LJohn in Texas
TR Breakfast: 
Optional Tracker breakfast will be at 6:00 AM at the IHOP at the Flying J truck stop in Limon. Use predictions 732, 733, 734. Rally students at Anton Supers Convenient Store. Trackers to travel towards Cope, (74 miles from Deer Trail) EOSS 332 Lite: Evergreen High School EOSS 333 Lite: Westminster High School EOSS 334 Lite: Golden High School