EOSS-252 Great Plains Super Launch - Recap

EOSS-252 was launched from the Hutchinson Kansas Airport as part of GPSL, and recovered southeast of Newton, Kansas.  It achieved an altitude of 98,990 ft.

Altitude vs. Time plots from aprs.fi have been added.  Please add any pictures to the galleries below.  

Original Announcement: 

Launch from Hutchinson Kansas as part of the Great Plains Super Launch conference.June 13: updated payload planPredictions are updated automatically starting 15 days before launch. These can be accessed at this link.

Event Date: 
Saturday, June 17, 2017 (All day)
Flight Coordinator: 
Launch Site: 
Hutchinson Days Inn, 40,40 Test N 38.4000, W 97.7500 Answer: 48.3, 62.7


This balloon carries redundant EOSS beacons, plus a new beacon for qualification, the KE7KCK GoPro beacon practicing for the Solar Eclipse, and a new cutaway/fast release unit for testing.

Balloon Type: 
1200g Totex Latex Balloon
5.8 ft orange and white nylon parachute with spreader ring
145.570 MHzKCØD-14APRS/Digi (EOSS)Primary Beacon, Timeslotted at 0:00 and 0:30
144.950 MHzKEØBMV-11APRS/DFSecondary Beacon
145.750 MHzKCØD-15APRS/DF/RF CutterQualifcation with new cutaway/fast release
147.420 MHzKCØD-11APRS/Digi (EOSS)Qualification

Preflight Net:

Eyeball net after tech session on Friday

Recovery Operations:

  • 446.100 MHz Field Simplex
  • 146.550 MHz Backup field simplex

Launch Site Simplex: 446.050 MHz

HF - Possible ops: 7.235 LSB

Tactical Calls: 
TacticalCall SignNameNotesTrackPoint 1.42 Xmit Time Slots
AlphaWAØGEH, KCØDMarty, Mark, Paula, SharonTracking Coordinator, Backseat Critics4 minutes @ 12 seconds
BravoNØNDM, KBØYRZLarry, Chris, JenLaunch, Backup Tracking Coordinator4 minutes @ 17 seconds
CharlieKDØSEM,W9KFB, KDØPWGDave, Ron, KevinTracker4 minutes @ 22 seconds
DeltaKØSCC, NØLPStephen, NickLaunch, Tracker4 minutes @ 27 seconds
EchoKCØLJohnTracker4 minutes @ 32 seconds
FoxtrotTracker4 minutes @ 37 seconds
GolfKCØRPSJimTracker4 minutes @ 42 seconds
HotelKCØUUORobTracker, EOSS President4 minutes @ 47 seconds
IndiaKE7KCKTomTracker4 minutes @ 52 seconds
TR Breakfast: 
Breakfast will be at Denny's, Limon, CO at 7:00, leaving at 7:00. Please have full tank of gas. Note in Nick.s fine GPSL document to have the reference point located in the parking lot of Days Inn. Add this reference location to your TrackPoint application: Days Inn: Lat/Long: N38.06990 deg., W97.79036 deg. (or N38 deg 4.194 min., W97 deg. 54.21 min.).. The Grid Reference Entry entry should look like this: Hutch,N,38,4.194,W,97,54.21 The primary and secondary launch site entries should look like this: Site 1: Hutchinson Airport Hutch AP,N,38,3.84,W,97,51.90,1542 Site 2: Newton Airport Newton AP,N,38,2.89,W,97,16.92,1532