From freja-info-mgr@plasma.kth.se Wed Apr 21 14:26 MET 1993 X-Listname: Freja Project Information mailing list Warnings-To: <> Date: Wed, 21 Apr 1993 12:14:51 GMT From: ZANETTI@AMPVX2.JHUAPL.EDU Subject: April 24-30 schedule To: freja-info@plasma.kth.se X-Vmsmail-To: SMTP%"freja-info@plasma.kth.se" ============================================ Freja Scientific Operations, April 24-30, 1993 ============================================ PI-group in charge: F2, Larry Zanetti Address all correspondence to : (SPAN) AMPTE::ZANETTI or zanetti@ampvx2.jhuapl.edu Last Hello till December from the US, 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. 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 your respective PI if you will attend. I will call each PI the first week in May for a final attendance number per team. Nick Lloyd has put into place the attitude schedule for April and I have repeated it here for reference, THERE IS NO PLAN THAT I AM AWARE OF FOR MAY. 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. 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) 4/27-4/29, orbits 2685, 2698, and 2715 respectively, the procedure has been to delay instruments ON or early OFF during subauroral zone times. 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 24 2640 ESS AOS ESS LOS Wake Sat 2641 ESS AOS ESS LOS Survey, 2642 ESS AOS ESS LOS Standard 2643 ESS AOS ESS LOS Standard 2644 ESS AOS ESS LOS Special IA, Ion Acceleration. 2645 PASS AOS ESS LOS High TM LHR 2646 PASS AOS ESS LOS High TM, CIH 2647 PASS AOS ESS LOS Standard 2648 PASS AOS PASS LOS Standard 2649 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 2650 PASS AOS PASS LOS Standard 2651 PASS AOS PASS LOS Standard Cancellation order: 2640, 2651 ----------------------------------------------------------- Apr 25 2653 ESS AOS ESS LOS Wake Sun 2654 ESS AOS ESS LOS Survey 2655 ESS AOS ESS LOS Standard 2656 ESS AOS ESS LOS Standard 2657 ESS AOS ESS LOS Standard 2658 PASS AOS ESS LOS High TM IA, Ion Acceleration. 2659 PASS AOS ESS LOS High TM, LHR 2660 PASS AOS ESS LOS Special CIH Cold Ion heating 2661 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 2662 PASS AOS PASS LOS Standard 2663 PASS AOS PASS LOS Standard 2664 PASS AOS PASS LOS Standard Cancellation order: 2653, 2664 ---------------------------------------------------------- Apr 26 2667 ESS AOS ESS LOS Special Wake Mon 2668 ESS AOS ESS LOS Survey Dump 2669 ESS AOS ESS LOS Standard 2670 ESS AOS ESS LOS Standard 2671 PASS AOS ESS LOS High TM LW 2672 PASS AOS ESS LOS High TM IA, Ion Acceleration. 2673 PASS AOS ESS LOS Standard 2674 PASS AOS ESS LOS Special CIH Cold Ion heating 2675 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 2676 PASS AOS PASS LOS Standard 2677 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard Cancellation order: 2667, 2677 ----------------------------------------------------------- Apr 27 2680 ESS AOS ESS LOS Special Wake Tues 2681 ESS AOS ESS LOS Survey 2682 ESS AOS ESS LOS Standard 2683 ESS AOS ESS LOS High TM SW 2684 ESS AOS ESS LOS High TM IA, Ion Acceleration. 2685 PASS AOS -5min LSL ON PASS AOS +5min LSL OFF PASS AOS +5min ESS LOS Standard 2686 PASS AOS ESS LOS Standard 2687 PASS AOS ESS LOS Special CIH Cold Ion heating 2688 PASS AOS Special FAC, Field Aligned Currents. PASS AOS +30s Triggered Burst enable (F1, auroral zone) PASS AOS +8min Burst force and Dump + 90sec PASS LOS 2689 PASS AOS PASS LOS Standard 2690 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard Cancellation order: 2680, 2690 ----------------------------------------------------------- Apr 28 2693 ESS AOS ESS LOS Special Wake Wed 2694 ESS AOS ESS LOS Survey 2695 ESS AOS ESS LOS Standard 2696 ESS AOS ESS LOS High TM IA 2697 PASS AOS ESS LOS High TM LW 2698 PASS AOS ESS LOS Standard ESS LOS -10min LSL ON ESS LOS +5min LSL OFF 2699 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 2700 PASS AOS ESS LOS Special CIH Cold Ion heating 2701 PASS AOS PASS LOS Standard 2702 PASS AOS PASS LOS Standard 2703 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard Cancellation order: 2693, 2703 ----------------------------------------------------------- Apr 29 2706 ESS AOS ESS LOS Wake Thur 2707 ESS AOS ESS LOS Survey 2708 ESS AOS ESS LOS Standard 2709 ESS AOS ESS LOS Standard 2710 PASS AOS ESS LOS High TM CIH Cold Ion heating 2711 PASS AOS ESS LOS High TM, IA, 2712 PASS AOS ESS LOS Special LHR 2713 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 2714 PASS AOS PASS LOS Standard 2715 PASS AOS PASS LOS Standard PASS LOS -10min LSL ON PASS LOS +5min LSL OFF SYWO AOS SYWO LOS Standard 2716 PASS AOS PASS LOS Standard 2717 PASS AOS PASS LOS Standard Cancellation order: 2706, 2717 ----------------------------------------------------------- Apr 30 2719 ESS AOS ESS LOS Wake Fri 2720 ESS AOS ESS LOS Survey Dump 2721 ESS AOS ESS LOS Standard 2722 ESS AOS ESS LOS Standard 2723 PASS AOS ESS LOS SW 2724 PASS AOS ESS LOS High TM IA, Ion Acceleration. 2725 PASS AOS ESS LOS High TM, CIH 2726 PASS AOS ESS LOS Standard 2727 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 2728 PASS AOS PASS LOS Standard 2729 PASS AOS PASS LOS Standard SYWO AOS SYWO LOS Standard 2730 PASS AOS PASS LOS Standard Cancellation order: 2719, 2730 -----------------------------------------------------------