From freja-info-mgr@plasma.kth.se Wed Apr 14 22:08 MET 1993 X-Listname: Freja Project Information mailing list Date: Wed, 14 Apr 1993 19:57:40 GMT From: ZANETTI@AMPVX2.JHUAPL.EDU Subject: Schedule April 17-23 To: freja-info@plasma.kth.se X-Vmsmail-To: SMTP%"freja-info@plasma.kth.se" ============================================ Freja Scientific Operations, April 17-23, 1993 ============================================ PI-group in charge: F2, Larry Zanetti Address all correspondence to : (SPAN) AMPTE::ZANETTI or zanetti@ampvx2.jhuapl.edu Hello again from the US, Happy Easter, please be aware of the special AGU session Friday, May 28. It appears to be an all day session with 18 papers submitted. I am also considering a Low Speed Link demo, we did receive Freja at APL Friday April 9. I am organizing a "Freja team" dinner that evening at a restaurant in Little Italy (~$30 per person), about 15min walk from the Convention Center; I will assume authors, please tell me otherwise for an approximate number. As Peter Rathsman told me, Freja is half a year old, time does fly, time to declare success. Nick Lloyd has put into place the attitude schedule for April and I have repeated it here for reference. I have also repeated the Syowa station info from Miyaoka, understanding that we are to receive data once per day except weekends. High TM mode has been scheduled twice per day over Esrange only , late passages to get closer to the pole; scheduled is one triggered burst per session, rotating F1, F2, F4, in a PA orbit, attempting to keep this at the latest reasonable local times, 8min to auto-trigger, please let me know if this allows enough dump time, about 8-10min. "Survey" is a special mode for F4 only?, (I am completely confused by the Special modes). Low Speed Link: Requested from myself, SSC, and F4 at Cornell I have scheduled out-of-auroral zone LSL ON times (10min/day) for Tues (US), Wed (Europe), and Thur (US) 4/20-4/22, orbits 2593, 2607, and 2623 respectively. Power has to be reduced by a total of 4 amps during those times, any volunteers? This communications link is a very impressive and innovative aspect of Freja and also transmits stored auroral zone event detection information from F1 and F2. Let me know any questions or comments, or objections. Larry Zanetti 1) Syowa Station ----------------- Please note that Syowa measurements started on 93-3-21. For those of you who don't know, the geographic coordinates of Syowa are latitude =- 69.00, longitude = 39.58. 2) Spacecraft Attitude Plans ---------------------------- Manfred, Per-Arne and friends sat down Wednesday 93-3-17 and worked out a plan for the Freja attitude over the next month and a bit. The goal is to have one (small) attitude maneuvre a week and then let the satellite drift. They have tried to choose a satelliteposition that has a favourable position for field line orientation, not too large a sun-angle and naturally drifts towards the next week's RA and DEC. Here are their results. Hopefully FOC can implement or comment on this plan as soon as possible. I suggest FOC or anyone else contact Manfred and/or Per-Arne if they have questions. Date Desired RA Desired Declination ---------------------------------------------------- 93-3-18 +10 -10 93-3-22 0 -18 93-3-29 0 -12 93-4-5 +10 -7 93-4-12 +14 -1 93-4-19 +34 -2 93-4-26 +50 -8 ----------------------- Orbit Schedules ------------------------------------------------- General: a) Common Burst mode once per day. Timed or triggered. (Dump on same passage) b) Two High TM rate for the time being. d) Survey mode once per group. (Dump at low lat Esr pass) *** E-mail from Stig-Ove 6-Apr*** Dear Freja science team, I have created eight new sequences for the ON/OFF switch of the experiments. Each sequence starts with sending the OFF commands to make sure we do not empty the batteries in case of trouble. Each sequence will thus start by asking if to switch F4 OFF or leave it ON for a whole orbit, ie Survey.2probe conf. The modes are: Name F4 F67 ----------------------------------------------------------------- PREPARE EXPERIMENTS ON, MODE 1 Default TESP only 2 Cav-1.sun 3 Cav-1.shadow 4 Cav-2 5 ElMag.2probe 6 Ion-te 7 K-1 8 K-2 We shall try to start this tomorrow (930407) and I think that F4 has to define which mode to be used since they are the only ones with different modes. (At the end of this EMAIL followes MODE 1 as an example) I would also like to point out that I have altered the BURST triggering sequences so that its possible to select the duration of the time one waits for the event. This is done by having two TIMEBASEs a: +30sec, The time when the Trigg is enabled. b: Force trigg, wait 90sec then dump. I would like to have these TIMEBASES relative to AOS or LOS (remeber LOS can be up to 3 minutes before 0deg El/Radio silence) and in minutes. Regards, Stig-Ove Silverlind Experiments for which FOC has not received any specific requests, will be run instandard science mode by default.The cancellation order is that the first listed orbit should be deleted first. ---------------------------------------------------------- ---------------------------------------------------------- DATE Orbit Mode ---------------------------------------------------------- Apr 17 2549 ESS AOS ESS LOS Wake Sat 2550 ESS AOS ESS LOS Survey, 2551 ESS AOS ESS LOS Standard 2552 ESS AOS ESS LOS Standard 2553 PASS AOS ESS LOS Special IA, Ion Acceleration. 2554 PASS AOS ESS LOS High TM LHR 2555 PASS AOS ESS LOS High TM, Sondre, CIH 2556 PASS AOS ESS LOS Standard 2557 PASS AOS PASS LOS Standard 2558 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30sec Triggered Burst enable (F1, auroral zone) PASS AOS +8min Burst force and Dump+90sec PASS LOS 2559 PASS AOS PASS LOS Standard Apr 18 2560 PASS AOS PASS LOS Standard Cancellation order: 2549, 2560 ----------------------------------------------------------- Apr 18 2562 ESS AOS ESS LOS Wake Sun 2563 ESS AOS ESS LOS Survey 2564 ESS AOS ESS LOS Standard 2565 ESS AOS ESS LOS Standard 2566 ESS AOS ESS LOS Standard 2567 PASS AOS ESS LOS High TM IA, Ion Acceleration. 2568 PASS AOS ESS LOS Sondre, High TM, LHR 2569 PASS AOS ESS LOS Special CIH Cold Ion heating 2570 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30sec Triggered Burst enable (F4, auroral zone) PASS AOS +8min Burst force and Dump + 90sec PASS LOS 2571 PASS AOS PASS LOS Standard 2572 PASS AOS PASS LOS Standard Apr 19 2573 PASS AOS PASS LOS Standard Cancellation order: 2562, 2573 Apr 19 2575 ESS AOS ESS LOS Special Wake Mon 2576 ESS AOS ESS LOS Survey Dump 2577 ESS AOS ESS LOS Standard 2578 ESS AOS ESS LOS Standard 2579 PASS AOS ESS LOS High TM LW 2580 PASS AOS ESS LOS Special IA, Ion Acceleration. 2581 PASS AOS ESS LOS Sondre, high TM 2582 PASS AOS ESS LOS Special CIH Cold Ion heating 2583 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F2, auroral zone) PASS AOS +8min Burst force and Dump + 90 sec PASS LOS 2584 PASS AOS PASS LOS Standard 2585 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard Apr 20 2586 PASS AOS PASS LOS Standard Cancellation order: 2575, 2586 ----------------------------------------------------------- Apr 20 2588 ESS AOS ESS LOS Special Wake Tues 2589 ESS AOS ESS LOS Survey 2590 ESS AOS ESS LOS Standard 2591 ESS AOS ESS LOS Standard 2592 ESS AOS ESS LOS High TM IA, Ion Acceleration. 2593 PASS AOS -5min LSL ON PASS AOS +5min LSL OFF PASS AOS +5min ESS LOS Standard 2594 PASS AOS ESS LOS High TM SW 2595 PASS AOS ESS LOS Special CIH Cold Ion heating 2596 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F1, auroral zone) PASS AOS +8min Burst force and Dump + 90sec ESS LOS 2597 PASS AOS PASS LOS Standard 2598 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard 2599 PASS AOS PASS LOS Standard Cancellation order: 2588, 2599 ----------------------------------------------------------- Apr 21 2601 ESS AOS ESS LOS Special Wake Wed 2602 ESS AOS ESS LOS Survey 2603 ESS AOS ESS LOS Standard 2604 ESS AOS ESS LOS Standard 2605 PASS AOS ESS LOS High TM LW 2606 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F4, auroral zone) PASS AOS +8min Burst force and Dump + 90sec ESS LOS 2607 PASS AOS ESS LOS High TM IA ESS LOS -10min LSL ON ESS LOS +5min LSL OFF 2608 PASS AOS ESS LOS Special CIH Cold Ion heating 2609 PASS AOS PASS LOS Standard 2610 PASS AOS PASS LOS Standard 2611 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard 2612 PASS AOS PASS LOS Standard Cancellation order: 2601, 2612 ----------------------------------------------------------- Apr 22 2614 ESS AOS ESS LOS Wake Thur 2615 ESS AOS ESS LOS Survey 2616 ESS AOS ESS LOS Standard 2617 ESS AOS ESS LOS Standard 2618 PASS AOS ESS LOS Special LHR 2619 PASS AOS ESS LOS High TM, IA, 2620 PASS AOS ESS LOS High TM CIH Cold Ion heating 2621 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F2, auroral zone) PASS AOS +8min Burst force and Dump +90sec ESS LOS 2622 PASS AOS PASS LOS Standard 2623 PASS AOS PASS LOS Standard PASS LOS -10min LSL ON PASS LOS +5min LSL OFF 2624 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard 2625 PASS AOS PASS LOS Standard Cancellation order: 2614, 2625 ----------------------------------------------------------- Apr 23 2627 ESS AOS ESS LOS Wake Fri 2628 ESS AOS ESS LOS Survey Dump 2629 ESS AOS ESS LOS Standard 2630 ESS AOS ESS LOS Standard 2631 PASS AOS ESS LOS SW 2632 PASS AOS ESS LOS High TM IA, Ion Acceleration. 2633 PASS AOS ESS LOS High TM, CIH 2634 PASS AOS ESS LOS Standard 2635 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F1, auroral zone) PASS AOS +8min Burst force and Dump +90sec ESS LOS 2636 PASS AOS PASS LOS Standard 2637 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard 2638 PASS AOS PASS LOS Standard Cancellation order: 2627, 2638 -----------------------------------------------------------