EOSS-200 & 201 CU Gateway and Demosat flight recap

Original Announcement: 

This launch of two 3000g latex balloons carries aloft experimetnal payloads from CU Boulder Gateway to Space, Colorado Space Grant Consortium demostats, and a Ozone payload from Watershead School in Boulder.

Latest Flight Prediction (click here, then click GIF to see the map)

Event Date: 
Saturday, November 15, 2014 - 00:00
Flight Coordinator: 
Jim Langsted KCØRPS
Launch Site: 
14 & 71 West, 10, 45


This balloon will launch 20 minutes later and carry eight Colorado Space Grant Demosat student payloads built by the following schools:

  • Metro State Univeristy
  • Community College of Denver
  • Colorado School of Mines
  • Slice o' Pi.

Colorado Space Grant Consortium website

Balloon Type: 
Totex 3000g Latex
8.5 ft with fast release
147.420 MHzKØSCC-11APRS/Cutter/DF
144.340 MHzKCØUUO-11Primary APRSTimeslotted at 0:15 and 0:45


This balloon celebrates the 200th EOSS flight and carries payloads of our most active client, Colorado Space Grant Consortium.

 This balloon will launch at 0650 MST from our launch site near Windsor Colorado (see a link for directions to the launch site elsewhere on this page).

This balloon will be carrying eight "Gateway to Space" student Balloonsats, the culmination of team efforts: designing, building, and testing payloads with a variety of experiments in each. Details of the program are available at the class website shown below.

 Gateway to Space website


Balloon Type: 
Totex 3000g Latex
10 ft with fast release
147.555 MHzAEØSSCW/cutdown beacon
445.975 MHzNØIX-11secondary APRS beacon
144.340 MHzAEØSS-11primary APRS beaconTimeslotted at 0:00 and 0:30

Preflight Net:

  • 147.225 MHz CRA Repeater (107.2 Hz Tone) 8 pm MDT preceding night
  • 146.940 MHz (103.5 HZ Tone) RMRL Repeater if the CRA machine is down
  • 146.640 MHz (100 Hz Tone) DRL will serve as a backup frequency

Recovery Operations:

  • 449.450 MHz RMRL (103.5 Hz Tone)
  • 448.225 MHz (141.3 Hz Tone) Testing… PL verified 7/2/14
  • 446.100 MHz Field Simplex for EOSS #200
  • 446.200 MHz Field Simplex for EOSS #201
  • 146.550 MHz Backup field simplex

Launch Site Simplex: 146.550 MHz

HF - Possible ops: 7.235 LSB

Tactical Calls: 
TacticalCall SignANameNotes
AlphaWA0GEH, KC0D, N0KKZMarty, Mark, RickTracking Coordinators
CharlieKC0LJohnTracker from Texas
DeltaK0SCC, KE0BMVSteve, ParkerTracker, Launch Team
FoxtrotKD0SEMDave, RyanTracker
GolfKB0YRZ, W9CNChris, MikeTracker
HotelKA0SDE, KC0IHAEric, MattTracker
IndiaKC5TRBHarryTracker, from Oklahoma
JulietKG5CAChuckTracker, from Texas, Statocasters
KiloKC0RPSJimTracker, Flight Coordinator
LimaWB0DKT, KB6OKAGlenn, Edna
WhiskeyKD0RNYChrisTracker, CU Sponsor, CSG
TR Breakfast: 
Greetings Trackers! Get ready for a really cold day as the temps for our flights EOSS #200 and #201 are expected to hover around or below 26 deg at launch time. Watch the weather forecasts. Please bring plenty of cold-weather clothes, food, water, scarves, gloves and a full tank of gas. The prediction shows to be about 10 miles north of Akron and 32 miles east of Ft. Morgan. We will need to keep careful counts on students as they enter the fields as well as make sure nobody goes in alone. For this flight, trackers welcome Harry, KC5TRB from Oklahoma, John, KC0L from Texas, Chuck, KG5CA from Texas. Additionally, riding with Eric, is Matt, KC0IHA trying his wings with APRS while zipping down the road. Welcome to all! Folks coming into the recovery area will have a long drive and we encourage them to start as soon as possible. Be sure to join us for the EOSS Flight #200 celebration. See this Web site for details... Breakfast looks like Ft. Morgan McDonald's where we will need to leave at 6:30am to have any chance at being at the recovery site by 7:00. First launch is at 6:50. Be Safe!! - Marty and Mark, EOSS Tracking and Recovery Coordinators