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ISEE-3

ISEE-3 Update

By Keith Cowing
NASA Watch
July 9, 2014
Filed under

ISEE-3 Status Report 9 July 2014 (afternoon)
“Our troubleshooting today eliminated some suspected causes of propulsion system problems. We do not think any of the valves are malfuctioning. Right now we think there is a chance that the Nitrogen used as a pressurant for the monopropellant Hydrazine propulsion system may have been depleted. That said, we still have a number of troubleshooting options yet to be explored. We have a DSN pass scheduled for Friday that will allow us to recalibrate our location information and trajectory plans for ISEE-3. Even if the L-1 halo orbit is no longer an option, we do have plans to use ISEE-3 for science in other locations within the inner solar system after the lunar flyby on 10 August.”
ISEE-3 Current Location 21 June 2014
Worldwide Audience for ISEE-3 TCM Burn
Top 12 visiting countries for #ISEE3 Telemetry mirror server of today @ISEE3Reboot 1/2
Rest of the visiting countries for #ISEE3 Telemetry mirror server of today @ISEE3Reboot 2/2

NASA Watch founder, Explorers Club Fellow, ex-NASA, Away Teams, Journalist, Space & Astrobiology, Lapsed climber.

6 responses to “ISEE-3 Update”

  1. Steven Rappolee says:
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    maybe somehow you could settle the fuel using thrusters long enough to get partial burn?

    • Denniswingo says:
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      We are looking at all options.

      • Steven Rappolee says:
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        it would I suppose depend on the geometry of the thrusters used for spin up and/or any other thrusters,perhaps this and a combination of heating the fuel tanks with the sun angle to cause some of the propellant vaporize? a spinning spacecraft would force propellant to slosh up against the tanks with out a pressure? maybe despin the spacecraft?

  2. Charles Dickson says:
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    So were the spinup burns and first TCM burn just the last of the nitrogen? Or was there something going on that can be reproduced to squeeze out the last of the TCM burns? Can heat be used to produce some pressure?

  3. Charles Dickson says:
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    So were the spin-up burns and the first TCM burn just the last of the Nitrogen? Or was something else going on that could be reproduced for the last TCM burns? Could heat be used to produce pressure? I know you’ve probably thought of both of those questions already, just curious what answers you’ve come up with to them.

  4. lidarsci says:
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    I hope it goes without saying but, as someone who supported this effort financially- absolutely worth it!