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Isee3 Reboot

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Isee3 Reboot

  1. 1. 1/42 Rebooting an old Spacecraft – ISEE3 Reboot Support @AMSAT-DL Achim Vollhardt, DH2VA Mario Lorenz, DL5MLO For the AMSAT-DL / Bochum Observatory Team
  2. 2. Mario Lorenz (DL5MLO), Achim Vollhardt (DH2VA), on behalf of the AMSAT-DL/Bochum observatory team AMSAT-UK colloquium 2014 adapted for HaSi-Talks by Frank (DL6DBN) - Nov. 2014 1
  3. 3. International Sun-Earth Explorer 3 ● Launched August 12 1978, 15:12:00 UTC Delta Launch 1978-079A ● Halo-Orbit at L1 ● Study Sun/Earth Interaction: Plasmas, Waves, Fields ● Other in series: ISEE-1 (NASA), ISEE-2 (ESA) 2
  4. 4. Spacecraft Firsts ● First S/C to achieve SEL1 Halo Orbit ● First Cometary Encounter (Giacobini-Zinner, 1985) ● First Transcontinental Antenna Arraying Image: http://tmo.jpl.nasa.gov/progress_report/42-84/84W.PDF 3
  5. 5. Image Source: NASA 4
  6. 6. Further Mission of ICE ● 1985 Comet Flyby (tail) of Giacobini-Zinner ● 1986 Comet Flyby (Halley) ● 1991 Mission Update: Monitor Solar CME's (with Ulysses (1990-2009) ● 19 Dec 1995: Modulation turned off. Carrier used for Radio Science ● 5 May 1997: Termination of Operations ● 18 Sep 2008 DSN tracks Carrier 5
  7. 7. Robert Farquhar • born 1932 in Chicago, IL • ISEE-3 flight director • mission director for NEAR, CONTOUR, MESSENGER, New Horizons his idea: use ISEE-3 with its limited fuel and comm system for comet encounter by ‘stealing’ it from L1 (Giacobini-Zinner, Halley) one final major orbit maneuver (Apr 1986): put ISEE-3 for rendezvous with Earth-Moon 6
  8. 8. 7
  9. 9. 8
  10. 10. The end...? Dec 1995: switched off telemetry modulation, carrier remained for JPL radio science May 1997: ICE mission support officially ‘terminated’ Sep 2008: one final tracking pass by NASA DSN, updating orbital data 9
  11. 11. Analysis of GSFC Engineering Team, Feb 4 2014 http://www.planetary.org/blogs/emily-lakdawalla/ 2014/02070836-isee-3.html 10
  12. 12. conclusion from Emily Lakdawalla: http://www.planetary.org/blogs/emily-lakdawalla/2014/02070836-isee- 3.html 11
  13. 13. Mounting Pressure to do something 12
  14. 14. media ‘candy storm’ hamradio media: Funkamateur CQ-DL Southgatearc.org amsat-uk.org non-hamradio media: Spiegel Online SRF2 Wissen (swiss radio), DLF (german radio) Frankfurter Rundschau Bild newspaper (regional section) guest blog ‘The Planetary Society’ Gizmag.com and more.. 13
  15. 15. Bochum Observatory Outside … and inside 14
  16. 16. Getting to work (Feb 2014) ● Find frequencies/comms information: http://mdkenny.customer.netspace.net.au/ISEE-3.pdf ● Celestial Location: – Not on Horizons – With help from GSFC and JPL and some data translations: Trajectory Data loaded into Tracking Computer by James, G3RUH ● USRP with SBX board in place and hooked to LHCP port – No luck, but not really expected: Noise Figure ~5dB – G4DDK Preamp used at EVE reinstalled (Michael, DD5ER) 15
  17. 17. Focus Room 20m Dish 16
  18. 18. first success: Mar 2, 2014 17.8 dB CNR, range ca. 43 mill km 17
  19. 19. Situation Analysis ● We have: – Bochum Observatory Dish – Downlink Carrier Xpndr B ● We do not have: – Documentation about Telemetry Details, especially Uplink Details – Confirmation of Xpndr A (RHCP) – Capable Transmitter – NASA contact indicated required RX level at S/C would be -120 dBm – Initial estimate revised: ~10 kW Contact with NASA – and had to agree: No Go. 18
  20. 20. Mar 14: Dennis Wingo • CEO Skycorp Inc. • KD4ETA, SO-33 project lead • technoarcheologist • founder of the Lunar Orbiter Image Recovery Project (LOIRP) • US american 19
  21. 21. THE plan 2014 reverse exit trajectory (lunar swing-by) to bleed off heliocentric velocity and enter stable earth orbit Mike Loucks, @Astrogator_Mike, wwww.see.com 20
  22. 22. lunar swing-by swing-by required ca. 50km above lunar surface Mike Loucks, @Astrogator_Mike, wwww.see.com SHOW VIDEO 21
  23. 23. Apr 23: ISEE-3 Reboot Crowdfunding ● Pledge for $125k within 30 days for hardware, travel expenses ● Turned out to be successful ● Build out Arecibo both for Receive and Transmit 22
  24. 24. May 21: space act agreement with NASA http://sservi.nasa.gov/wp-content/uploads/2014/05/ISEE-3-Space-Act- Agreement.pdf LOTS of legal issues.. but some really important bits: • ‘.. team members shall be limited to US nationals only.’ • major steps need ‘Authorization to proceed’ (ATP) from NASA 23
  25. 25. Get to work ● Install additional hardware – 2nd LNA, Second USRP for XPNDR-A – 1PPS Distribution for exact time Synchronization – Bandpass filters for both Receive Chains BPF G4DDK LNA USRP N210 S-Band RHCP S-Band LHCP BPF G4DDK LNA USRP N210/GPS Focus Room Control Room Z3801 24
  26. 26. May 22: getting telemetry Puerto Rican antenna + german-built (4 weeks!) power amplifier (DK2FD) www.naic.edu 25
  27. 27. May 29: Telemetry Switched On …. unfortunately switching to a rate where link would not yet close in Bochum 26
  28. 28. Making Sense of the Telemetry ● ITAR Restrictions on Documents ● Some were found on public NASA servers – Conflicting; Version Status unknown ● Trial & Error and Guessing → Frame can be decoded ● Analog calibration data is ITAR ? ● But apparently not for other contemporary S/C ? 27
  29. 29. Old Telemetry Screen 28
  30. 30. 29
  31. 31. 30
  32. 32. manual TRX switching powering and switching attenuators done by hand BIG THANK YOU to Phil Perillat, Dana Whitlow, Alessondra Springmann and the whole Arecibo team! 31
  33. 33. June: commanding and position scanning Arecibo beamwidth (2.2 arcmin = 0.04 deg) deviation in celestial coordinates from available data (ca. 0.5 deg) need coherent ranging (2-way ranging, including phase-locked uplink) for more detailed trajectory determination: NASA Deep Space Network (DSN) Telemetry in Bochum since Jun 25 using DSS-24 (Goldstone) for DSN tracking passes after some unsuccessful attempts: Jun 26/27: 2 ranging passes with a total of 15 range measurement points 32
  34. 34. Jul 2: spin up burn required: 11 pulses 19.16 rpm  19.75 rpm 33
  35. 35. 21
  36. 36. 35
  37. 37. Jul 2: spin up successful 36
  38. 38. Jul 8: course correction, attempt #1 • required: 7 m/s • some 400+ pulses req. • radial thrusters • fire 45 deg each rev • split into segments of 63 pulses max. THE main maneuver to get ISEE-3 on track to lunar swing-by 37
  39. 39. Jul 8: getting AMSAT-DL TLM display online www.amsat-dl.org 38
  40. 40. Jul 8: course correction, result #1 39
  41. 41. Jul 8: course correction, result #2 ‘denial-of-service attack‘ on webserver: ca. 500 users hammering server simultaneously page refresh limited to once a minute, REAL refresh of TLM each 2 sec! @DutchManPaul offers TLM mirror: http://isee3.p3s.nl/ 40
  42. 42. Jul 9: course correction, attempt #2 different thruster pair (opposite sign) same signature, so not thruster related but likely common issue propulsion pressure gone? 41
  43. 43. Jul 15: failure analysis (IRP) fuel + pressure still there wrong command sequence for thruster ops (documentation incomplete..) FIRST: switch on +28V SECOND: open HPS A/B latch valves THEN: fire thrusters going for another try on Jul 16 42
  44. 44. Jul 16 + 18: plumbing job and carburetor clean-out Jul 16: Trying correct valve sequences Going for long pulse sequences (512) to try and blow out residual hydrazine gas Trying different thruster pairs: radial #1, radial #2, spin down No significant effect on all combinations. One (?) single pulse though Jul 18: using different combinations of valves, heaters and firing sequences to learn as much as possible how spacecraft reacts  no smoking gun (literally!), no significant thrust 43
  45. 45. Ranging 44
  46. 46. Jul 23 : final attempt if everything fails: trying to hammer the valves (On-Off-On-Off-...) to see if this enables fuel flow and subsequently thrust on any combination 45
  47. 47. Jul 24: Interplanetary Citizen Science Mission no nitrogen pressurant left, no controlled lunar swing-by possible, no return to earth orbit switch ISEE-3 to science telemetry maximize data download 46
  48. 48. Outlook and lessons learned ISEE-3 will continue to orbit the sun and eventually come back to earth can ‘civilians’ take over a decommissioned spacecraft? YES Biggest problems: TIME uplink capability navigation (need coherent ranging testbed!) DIY DSN station. check: www.uhf-satcom.com groups.yahoo.com/neo/groups/amateur-DSN/info 47
  49. 49. Acknowledgements AMSAT-DL BOD especially Michael DD5ER for doing all the mech work Thilo Elsner DJ5YM, Sternwarte Bochum Phil Karn KA9Q, decoder magician James Miller G3RUH, keeping track Florian Wolters DF2ET (Webserver) @DutchManPaul Arecibo Staff Mike Loucks (@Astrogator_Mike), www.see.com ISEE-3 Reboot Project team 48
  50. 50. www.amsat-dl.org www.sternwarte-bochum.de spacecollege.org/isee3 49
  51. 51. Don Kirchner, University of Iowa: "This is the first Type III burst I've seen in the data.“ Aug 8 2014 50
  52. 52. Waving ISEE 3 Good bye August 10th, 2014 The ISEE3 reboot team with visitors and guests at “McMoon” the headquarter in a former McDonald Drive-In restaurant 51
  53. 53. ISEE-3 and GOES: Type III Burst Correlated to Solar Flares Aug 10 2014 52
  54. 54. Trajectory until August 2016 53
  55. 55. 54
  56. 56. http://spacecraftforall.com/ a Chrome Experiment 55
  57. 57. Mein Dank geht an: Achim Vollhardt (DH2VA) Mario Lorenz (DL5MLO) AMSAT-DL AMSAT-UK und den British Amateur Television Club 56

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