Announcement for EOSS-43

Check the EOSS List Server for the most up to date info.

Maps and Directions to "all" of the EOSS standard Launch Sites.

Prediction Page and a couple of WX Links

Upcoming Flights


LAUNCH DATE: August 26, 2000 (No Rain date)
LAUNCH TIME: 15:00 UTC - 09:00 MDT
LAUNCH SITE: Moved to the Circle 8 Ranch (see map for directions)

PREDICTED TRACK: (Detailed Prediction Data and Maps


  • The �Mars Micro Balloon Probe� which will place a series of balloons in the Martian atmosphere. The objective of this flight are to test and develop inflatable gases from compounds that are normally liquids at Standard Temperature and Pressure (STP). The Mars surface pressure is simulated at 100,000 feet above sea level, thus the experiment on an EOSS balloon. This experiment will attempt to inflate balloons using various compounds. This will also permit a test of the deployment canisters required on Mars.

    The EOSS Shuttle II ATV camera will monitor the balloon deployment and inflation. Tune in for the excitement.


  • Pioneer Astronautics, Dr. Robert Zubrin, Dean Spieth, �Mars Micro Balloon Probe�.


  • Preflight Foxhunt Net 8 pm the night before flight
    • 147.225 MHz Colorado Repeater Association
  • Launch Site:
    • Simplex 146.550 MHz
  • Telemetry:
    • 144.340 MHz APRS, Temps in and out, housekeeping, generic navigation
  • ATV
    • 426.250 MHz NTSC video
  • Beacon
    • 147.555 MHz
  • Crossband Repeater (tentative pending weight calculations)
    • Input 445.975 MHz
    • Output 147.555 MHz
  • APRS
    • APRS String on the output of the EOSS Shuttle II
  • Foxhunters:
    • 448.450 MHz Pikes Peak FM Association (pending approval)
    • 146.58 MHz Simplex Field Frequency
  • HF Net 7.235 MHz


EOSS #43 is on schedule and will launch at 9:00 am MDT, August 26, 2000 (there is no rain date at this time). The launch site is Circle 8 Ranch. Listen for the beacon on 147.555 and look for ATV on 426.25. The flight should reach 100,000 ft. and the beacons should be heard in a 400 mile radius.

We also welcome Gary Snyder and Dean Spieth from Pioneer Astronautics. They are continuing a series of experiments and flights to test inflation techniques using various liquid/gas compounds and balloon deployment canisters for future Mars balloon missions.

Friday night, August 25, either Marty [WA0GEH] or George [N0NJM] will conduct the tracking and recovery net on 147.225, 8:00 MDT. Logistics for the tracking and recovery operation will be discussed. Please plan to listen in or, if you are interested, joining the effort.

Tracking and Recovery People: Please advise if you can support this flight to Marty Griffin, or 303-470-5471. This will save a phone call, thanks.

The Tracking and Recovery net will be on 448.450 MHz Saturday, August 26. At about 7:00 am logistic traffic will start to flow. This will be become a DIRECTED net, all traffic for the recovery effort will be directed through George [N0NJM].


Shuttle Generated Automatic Position Reporting System (APRS):

Some of the APRS systems aboard EOSS payloads will act as digipeaters. However, we request that only the Chase team use this system in order to minimize the disruption to the packet telemetry. Chase team APRS info is used to assist in coordinating placement of the various DF teams.

Please disable your beacons on the EOSS packet frequencies, as that will minimize interference to other stations in your area trying to copy telemetry. Of course, if we are on the National APRS frequency, you should continue to beacon out your data as usual. WE do NOT want to interfere with 144.390 MHz traffic other than to add our balloon's location.