Flight Recap for EOSS-193

03/10/2014 09:59 (CDT): The picture below and a link to video of the landing

Montclair Scientists

by Bob Haldeman forwarded to EOSS by Jim Langsted


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username: photos@eoss.org
password: photos

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Mileage Compensation Form

Not a compensated flight

Flight Coordinator: Jim Langsted

LAUNCH DATE: February 22nd, 2014 (wx delay +1 day)
LAUNCH TIME: 07:10 am MST (14:10 UTC)
LAUNCH SITE: Windsor, CO (Driving Directions to Windsor Launch Site)

Pre-flight Prediction and Actual Tracks

E0SS-193 AE0SS-11

Blue = Actual Track
Green = Predicted Ascent Phase
Red = Predicted Descent Phase

Map made with MapPoint
Prediction made with Balloon Track


Green Track = Ascent
Red Track = Descent (NO DESCENT TRACK)
Prediction and Actual tracks made with Balloon Track

Maps by Google Earth

Launch Site - Windsor
Launch Point: 40.47367� lat. -104.96233� long.
Grid: X=-62.00 Y=70.61
Ascent Rate: 1329 feet per minute
Descent Rate: 1000 feet per minute
Altitude: 4931 feet
Predicted Landing Site
Landing Point: 40.15473� lat. -103.1854� long.
Grid: X=31.5 Y=48.6
Altitude: 4589 feet
Flight Time: 118 Minutes
Bearing: 102.7� True
Range: 96.1 Mi.
Actual Landing Site
Landing Point: 40.12802� lat. -103.20843� long.
Grid: X=30.3 Y=46.7
Bearing: 103.9� True
Range: 95.39 Mi.
Difference from Predicted to Actual Landing Site
Bearing: 213.4� True
Range: 2.207 Mi.

Final Pre-Flight Prediction is available here
Prediction History is available here

EOSS Flight Day Frequencies:

Tracking and Recovery Frequencies

Preflight Net:

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

Tracking and Recovery Operations  

  • Front Range and out east 
    • 449.450 MHz RMRL (103.5 Hz Tone)  Primary
    • 145.295 MHz (100.0 Hz Tone)  Sterling Repeater 1st Backup
    • 145.400 MHz (123.0 Hz Tone) Colorado Connection 2nd Backup
    • 145.310 MHz (123.0 Hz Tone) Colorado Connection Front Range connection link near launch site
  • Field Simplex Frequencies   
    • 446.100 MHz simplex for field recovery operations
    • Note: Some radios insist on incorrectly placing a negative 5 MHz offset when selecting frequencies from the simplex portion of the 70 CM band. Check your radio and if this is the case. Consider programming in this simplex frequency to a memory channel as some radios have demonstrated the annoying habit of re-inserting the offset if you momentarily shift to a repeater then return to the simplex freq. Check the operation of your radio on this simplex freq to be ready for however your radio behaves.
    • 146.550 MHz Backup field simplex
  • Repeater Coverage Pages - Listings of all repeaters available in the expected flight areas.
  • There may be FRS operations see THIS PAGE for a list of channel numbers and their associated UHF Frequencies.

Ground Stations Frequencies

  • Launch Site Simplex
    • AE0SS-2 voice callsign
      • 146.550 MHz
  • HF - Possible ops
    • 7.235 LSB


EOSS-193 Balloon Payload Frequencies  

  • Beacons
    • 147.555 MHz
      • CW ID: AE0SS
  • APRS
    • 144.340 MHz
      • ID: AE0SS-11
      • DIGI: EOSS
      • APRS Time Slotted Every 30 seconds at 0:00 and 0:30
    • 445.975 MHz  
      • ID: N0IX-11
    • 145.600 MHz
      • ID: KC0UUO-11

Flight Systems:   


Balloon Manufacturer Totex
Balloon Type latex
Balloon Size 1200 g
Neck Load 11.3  Lbs.
Neck Lift 14.7 Lbs.
Ascent Rate 1329 fpm estimated
Estimated Burst Alt 90,000 ft. ASL
Descent Rate 950 fpm estimated
Parachute 5 ft.


Payload Configuration:

Payload Experiment Designer

EOSS payload qualifications

Experimenters are welcome to submit websites for linking or overviews which I will post on a page on the EOSS website.

Internet Gateway Stations:

as seen on Findu.Com (listed alphabetically)


  • AD0HC - Garold Maier, Pueblo, CO
  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • K0JSC-1 - Jeffrey Carrier, Ca�on City, CO
  • KD0MBL - Neal Tew, Pueblo, CO
  • KD0SEM - Dave Lanning, Hudson, CO
  • N0EB-1 - Richard Beggs, Thornton, CO
  • N0SPB - Shaun Bryant, Commerce City, CO

EOSS-193, KC0UUO-11

  • KC0D-2 - Mark Patton
  • KD0MBL - Neal Tew, Pueblo, CO

EOSS-193, N0IX-11

  • AE0SS - Nick Hanks, Ground Station (using club callsign)
  • N0SPB-10 - Shaun Bryant, Commerce City, CO


In addition to our crew of regulars, welcome to Pueblo and Canon city stations. Thanks for the coverage. The FAA always likes a good reliable track and you guys helped out with that on this flight.

EOSS wishes to express our sincere appreciation to the stations above who iGated the balloon APRS telemetry onto the internet. Did you know I publish predictions for i-gates? I keep a list of everyone who has ever i-gated an EOSS balloon flight. You're all in the list so if you're wondering when the balloon will pop up over your horizon, check out this page for future flights.  Currently predictions are being made for 30 i-gates.

We are relying heavily on real time position information available on the net to allow the FAA controllers to have up to the minute location data to assist them in air traffic control.

Redundant stations for the balloon iGating provide excellent coverage. If you are able to iGate we invite you to join the Internet Gateway Team. Contact me (webmaster@eoss.org) to be put in touch with the coordinator. By joining the team, you are giving peace of mind to the iGate coordinator for that flight. He knows you'll be there and he can rely on you.

Naturally, anyone can iGate data onto the net and even if you aren't a member of the team we will welcome your contribution to the internet based tracking effort. If you callsign appears on the findu.com log, you'll be shown as a contributing station as those above are.

Having more than one station covering each APRS beacon means that should a station drop out momentarily, the others can often maintain the data flow.

Thanks again guys! The FAA (and EOSS) are very grateful for your assistance in this endeavor.

Future I-Gaters:

Check out the EOSS I-Gate page for information on how to participate and why we need you.

Current I-Gate Stations:

Guys, the prediction program used to determine the track of the balloon prior to flight can now output a prediction for the Rise, Closest Approach or maximum elevation, and Set of the balloon for each of your stations. I have posted a prediction page for stations that I have been able to discover geographic coordinates. See the I-Gate prediction page for an example. The page will not be updated daily, however, it will be updated the evening prior to flight for I-gate planning purposes.

I have often been asked by iGaters when they should expect to either start receiving signals (AOS) or expect to see those signals disappear (LOS). This prediction page should answer all those questions for you.

Tracking and Recovery Operations 

Hello Trackers!

We will be launching our annual EOSS qualification flight on Saturday Morning, 2/22 with a weather date of 2/23. It appears this will be a very long flight heading over 100 miles downrange to about 10 miles east of Akron. Nick and Mike have advised me that Jack Roland, KE0VH, has installed an APRS Digi-peater (KE0VH-4) near Akron. EOSS thanks Jack for taking that initiative. We may need to get an early start so we can be closer to the prediction by 7:00. Sorry Jim, KC0RPS will not join us. Hope to see you at the launch site?

As a reminder, at the recovery site, be sure to meet and greet the 4th grade students and learn about their experiment. These are students from Montclair School of Academics who are flying an �Enrichment Biological� environmental survival experiment. We thank Jim, KC0RPS for persisting with their teacher Karl Horeis, KB7UPC. Let�s make it fun for the young scientists.

Shaun, N0SPB plans to Shadow N0JPS and W9CN and fly his �Quadcoptor�. It is a DJI Phantom Vision with a 1080p camera for recording and a lower resolution down link for live view. Once he has a good idea of the landing location, he will launch. As it stands he has about 1 hour of time in the air in 25 minute segments. Should be interesting for the students. We will need to hilltop the RMRL 449.450 repeater to reach the ground station operators. I will take the responsibility to straddle the unknown second repeater and the RMRL repeater as best I can. Stay tuned for some research on the second repeater. Ideas? Here�s the scoop. Please advise Rick, N0KKZ (for the Web site updates) and me of any omissions or corrections.


For breakfast, we can convene at the McDonalds in Ft Morgan at 5:45. Post-flight meal will probably be destined for the Digger�s in Brush where we get the finest service in eastern Colorado.



Tracking and Recovery Grid 

TrackPoint Grid Reference Location

Grid X

Grid Y

Last Chance



Grid Test   N 39.800, W103.100



Tactical Call Signs  



Call sign





Marty, Mark

Tracking and Recovery Coordinators (HF)



Mike, John, Miles

Tracking, Recovery




Tracking, Recovery



Stephen, Doug

Tracking, Recovery (HF)




Tracking, Recovery



Don, Dan

Tracking, Recovery (HF)




Tracking, Recovery, Friday Net Control




Tracking, Recovery (HF)



Larry, Benjie

Launch, Tracking, Recovery


W0NFW, N0ZTO George, Greg Tracking, Recovery


Text Recaps



Launch Site

Landing Sequence

Recovery Operations


recorded by not uploaded




Pre-Flight Prediction Files


Findu Full Packet Log for vicinity of flight


EOSS-193 AE0SS-11


 Spread Sheets

Mapping Files


EOSS-193 KC0UUO-11


Mapping Files

EOSS-193 N0IX-11


Mapping Files