Page 1 PROGRESS REPORT THE SOLAR-A SOFT X-RAY TELESCOPE (SXT) PROGRAM (CONTRACT NAS8-37334) (for July 1995) OVERVIEW The YOHKOH Mission is a program of the Japanese Institute of Space and Astronautical Science (ISAS) with collaboration by the U. S. National Aeronautics and Space Administration and the U. K. Science and Engineering Research Council. The YOHKOH satellite was launched on 30 August 1991 from Kagoshima Space Center (KSC) in Japan. The purpose of this mission is to study high energy phenomena in solar flares and the Sun's corona. Under an international cooperative agreement, Lockheed, under NASA contract, is providing a scientific investigation using the Soft X-ray Telescope (SXT), one of the primary experiments of the mission. The SXT was developed at the Lockheed Palo Alto Research Laboratory in cooperation with the National Astronomical Observatory of Japan, and the Institute for Astronomy of the University of Tokyo. MAJOR PROGRAMMATIC ACTIVITIES IN THE MONTH The RFP for the extended mission was received towards the end of the month. The proposed effort will cover a total of four years: two years are for operations, and all four years are for data analysis. The original Co-I's are also included in the extended program. << Solar Activity >> The solar activity remained low during the month. There were only a few flares during the month, mostly B class, although there was one reported C class flare on 2 July. There have been typically two or three active regions present most of the time. AR 7890 produced six B-class flares and some jets were successfully observed in the partial frame data. SXT is now observing numerous bright points and some large-scale coronal eruptions. The SXT observing program has been adapted to the quieter solar conditions by carrying out longer exposure observations of the diffuse corona and by coordinated programs with Mees Observatory, Hawaii, to monitor large filaments in the hopes of observing a filament eruption. << Campaigns >> After a busy, campaign-filled June, July was fairly quiet. Some preparation work was done for the upcoming Spartan flight which was later postponed. The filament monitoring campaign was conducted with Mees Observatory during appropriate times. << Science >> There continues to be much interest in the pixon method for reconstructing HXT images. Nitta and Yaji have recently used Tom Metcalf's code to study an M1 flare that was observed on 21 August 1992 and which allegedly had a super-hot (34 MK) component. By comparing SXT and HXT images they have discovered that the super-hot component is formed in a loop structure that is different from the main, 10-20 MK component of the flare. They have written a paper that has been submitted to Ap J Letters. << Publications>> The following is an incomplete listing of work in progress on papers and presentations that include scientists that are supported by the NASA SXT contract. - Papers Published (1) - "Detection of Nonthermal Radio Emission from Coronal X-ray Jets," M. R. Kundu, J.-P. Raulin, N. Nitta, H. S. Hudson, M. Shimojo, K. Shibata, and A. Raoult, 1995, ApJ (Letters), 447, L135. - Papers accepted (4) - "Microwave and Hard X-ray Observations of Footpoint Emission from Solar Flares," M. R. Kundu, N. Nitta, S. M. White, K. Shibasaki, S. Enome, T. Sakao, T. Kosugi, and T. Sakurai (ApJ). "Joint Radio and Soft X-ray Imaging of an ``Anemone'' Active Region" A. Vourlidas, T. S. Bastian, N. Nitta, and M. J. Aschwanden (Sol Phys). "Metric Type III Bursts Associated with Soft X-ray Jets," J.-P. Raulin, M. R. Kundu, N. Nitta, H. S. Hudson, and A. Raoult (Sol Phys). "VLA and Yohkoh Observations of an M1.5 Flare," N. Gopalswamy, J.-P. Raulin, M. R. Kundu, N. Nitta, J. R. Lemen, R. Herrmann, D. Zarro, and T. Kosugi (ApJ). - Papers Submitted (1) - "A Super-hot Flare Observed by Yohkoh," Nariaki Nitta and Kentaro Yaji (ApJ Letters). - Presentations (0) - - Abstracts submitted(0) - << Public Use of SXT Images >> Keith Strong arranged for a producer and a camera crew from the Discovery channel to visit Lockheed to discuss the Yohkoh/SXT project. Keith was filmed during an interview in which he described the research that is done with Yohkoh data. Greg Slater worked with Keith to provide special SXT sequences which the camera crew were able to directly copy from the Sony laser disk. The SXT engineering model even made a cameo appearance with some of the members of the laboratory. A seven minute program will be prepared and broadcast later this year. << Yohkoh Operations and Health >> Yohkoh and the SXT continue to function very well. No significant degradation in the instrument has occurred since the loss of the front thermal shield in 1992. SXT experienced a normal level of Single Event Upset (SEU) events during the month: SXT bitmap error July 5 Pass 2; 950705-0514 recovered in the same pass SXT bitmap error July 12 Pass 1; 950712-0205) recovered in the same pass SXT bitmap error July 13 Pass 1; 950731-1135 recovered in the Passes 2&3 The overlap between Yohkoh and ASCA currently is very severe, but the loss of data has partially been minimized, thanks to the recent addition of the Santiago station. Page 5 << Data Flow >> ------------------------------------------------------------------------------ Month Full Frame Images Observing Region Images Received Lost Received Lost Loss % QT FL Tot Thru Apr-93 120916 57359 445812 220608 666420 241787 26.47 May-93 8571 3950 41832 7518 49350 21971 30.81 Jun-93 7340 2589 64545 12539 77084 26299 25.44 Jul-93 8259 3650 47561 5352 52913 24213 31.39 Aug-93 7628 3638 30705 3563 34268 17436 33.72 Sep-93 6875 2899 22697 5600 28297 11252 28.45 Oct-93 7474 3657 33782 7548 41330 20104 32.72 Nov-93 8504 3864 42953 5849 48802 23896 32.87 Dec-93 5898 3047 21128 13297 34425 13001 27.41 Jan-94 6934 2804 28567 10960 39527 13746 25.80 Feb-94 7000 2840 23021 5819 28840 11257 28.07 Mar-94 7736 2627 69273 3733 73006 31464 30.12 Apr-94 6142 2741 22707 3390 26097 12338 32.10 May-94 7070 2679 25260 3040 28300 10862 27.74 Jun-94 7417 2738 36795 1996 38791 15760 28.89 Jul-94 7488 2941 50540 3275 53815 24153 30.98 Aug-94 7370 2337 35067 3993 39060 13485 25.66 Sep-94 7079 2552 25131 2855 27986 10677 27.62 Oct-94 7244 2497 25868 5884 31752 10319 24.53 Nov-94 6569 1941 26243 1956 28199 9293 24.79 Dec-94 6429 2456 26763 2583 29346 11904 28.86 Jan-95 6870 2349 26103 1699 27802 10211 26.86 Feb-95 6556 2545 23635 3825 27460 10111 26.91 Mar-95 5915 2082 21485 3448 24933 8485 25.39 Apr-95 6244 2266 22946 4493 27439 9688 26.09 May-95 7084 2884 29617 2647 32264 15331 32.21 Jun-95 7210 3087 25251 307 25558 12045 32.03 Jul-95 266 101 933 40 973 395 28.87 Aug-95 0 0 0 0 0 0 0.00 Total 306088 131120 1296220 347817 1644037 641483 28.07 Number of Full Frame Images Received: 306088 Number of Observing Region Images Received: 1644037 Total: 1950125 Approximate Number of Shutter Moves/CCD Readouts: 3409864 NOTES: * The loss of images is mainly due to BDR overwrites, but there are also occasional DSN dumps which are lost. * It is common to have observing regions which contain more than 64 lines, which requires multiple exposures to make a single observing region image. This is why the number of shutter moves is larger than the number of images received plus those lost. Page 6 << Engineering Summary Table >> -------------------------------------------------------------------------------- Month Avg Dark Level # of Dark Spikes CCD Warmings Front Optical (DN) (e/sec) Over 48 Over 64 High / # Support Trans Temp /Days Temp (%) May-93 43.45 485.3 16405 2357 17.3 N/A Jun-93 44.03 507.2 20037 2531 16.3 N/A Jul-93 44.46 523.4 23020 2600 22.5 / 2 17.7 N/A Aug-93 44.20 513.6 21319 2598 25.2 / 3 17.2 N/A Sep-93 45.07 546.2 27469 2745 17.5 N/A Oct-93 45.40 558.6 31684 2982 17.7 N/A Nov-93 45.33 555.8 32047 3210 23.8 / 3 19.7 N/A Dec-93 45.92 578.1 38515 3101 19.2 N/A Jan-94 46.00 580.9 39074 3088 22.5 / 2 20.3 N/A Feb-94 46.03 582.1 40449 3246 19.3 N/A Mar-94 45.92 578.0 39715 3420 18.2 N/A Apr-94 45.97 579.9 41302 3721 25.2 / 3 17.8 N/A May-94 46.25 590.3 45476 3557 18.3 N/A Jun-94 45.83 574.6 39340 3547 17.8 N/A Jul-94 46.76 609.5 53417 3990 18.2 N/A Aug-94 46.98 617.6 57624 4050 25.2 / 3 18.2 N/A Sep-94 47.07 620.9 58580 4028 18.3 N/A Oct-94 47.34 631.3 64974 4346 19.0 N/A Nov-94 47.64 642.4 70877 4703 20.4 N/A Dec-94 47.82 649.1 74246 4917 21.5 N/A Jan-95 48.55 676.7 89758 5457 20.0 N/A Feb-95 48.70 682.1 92457 5781 25.2 / 3 20.5 N/A Mar-95 48.35 668.9 85527 5271 19.4 N/A Apr-95 48.72 682.8 93904 5627 19.1 N/A May-95 48.73 683.4 94000 5820 18.8 N/A Jun-95 49.08 696.3 100780 6281 19.6 N/A Jul-95 N/A N/A N/A N/A 18.7 N/A Aug-95 N/A N/A N/A N/A 0.0 N/A NOTES: * The dark current calculations are using full half resolution 2.668 sec images not taken in during the SAA. The dark current rate assumes a "fat zero" of 30.5 DN and a gain of 100 e/DN. * The entrance filter failure of 13-Nov-92 eliminated the capability of taking optical images, so the optical transmission is not available after Nov-92. It also caused an increase in the dark current signal, however some of the increase shown here is an increase in the readout noise and is not a function of exposure duration. Page 7 << Personnel Travel >> SXT Foreign Travel between 1-JUL-95 and 31-JUL-95 ALEXANDER 1-JUL-95 * 31-JUL-95 * 31 (total of 31 days) HUDSON 3-JUL-95 31-JUL-95 * 29 (total of 29 days) LEMEN 1-JUL-95 31-JUL-95 31 (total of 31 days) LINFORD 1-JUL-95 * 19-JUL-95 19 (total of 19 days) WEBER 27-JUL-95 31-JUL-95 * 5 (total of 5 days) METCALF 1-JUL-95 * 6-JUL-95 6 (total of 6 days) ---------------------------------------------------------------- Grand Total of 121 days for 6 people NOTE: The "*" signifies travel that actually ends after 31-JUL-95 SXT Foreign Travel between 1-AUG-95 and 31-AUG-95 ALEXANDER 1-AUG-95 * 2-AUG-95 2 (total of 2 days) HUDSON 1-AUG-95 * 7-AUG-95 7 23-AUG-95 31-AUG-95 * 9 (total of 16 days) NITTA 25-AUG-95 31-AUG-95 * 7 (total of 7 days) SLATER 14-AUG-95 31-AUG-95 * 18 (total of 18 days) WEBER 1-AUG-95 * 31-AUG-95 * 31 (total of 31 days) JIAO 1-AUG-95 28-AUG-95 28 (total of 28 days) ---------------------------------------------------------------- Grand Total of 102 days for 6 people NOTE: The "*" signifies travel that actually ends after 31-AUG-95 Respectfully submitted, James R. Lemen Frank M. Friedlaender Page 8 ------------------------------------------------------------------------------- NASA REPORT DOCUMENTATION PAGE (IN LIEU OF NASA FORM 1626) --------------------|--------------------------|------------------------------- 1. REPORT NO. | 2. GOVERNMENT | 3. RECIPIENT'S DR-01 | ACCESSION NO. | CATALOG NO. --------------------|--------------------------|------------------------------- 4. TITLE AND SUBTITLE | 5. REPORT DATE Monthly progress report - for the month of | 9 August 1995 July 1995 |------------------------------- | 6. PERFORMING ORG | CODE: O/91-30 -----------------------------------------------|------------------------------- 7. AUTHOR(S) | 8. PERFORMING ORGANIZA- J. R. Lemen | TION REPORT NO: F. M. Friedlaender | |------------------------------- -----------------------------------------------|10. WORK UNIT NO. 9. PERFORMING ORGANIZATION NAME AND ADDRESS | Lockheed Palo Alto Research Labs B/252 |------------------------------- Solar & Astrophysics Laboratory O/91-30 |11. CONTRACT OR GRANT NO. 3251 Hanover Street, Palo Alto Ca. 94304 | NAS8 - 37334 -----------------------------------------------|------------------------------- 12. SPONSORING AGENCY NAME AND ADDRESS |13. TYPE OF REPORT AND Marshall Space Flight Center (Explorer Program)| PERIOD COVERED Huntsville Alabama 35812 | Progress report for the month | of July 1995 |------------------------------- |14. SPONSORING AGENCY | CODE MSFC / AP32 -----------------------------------------------|------------------------------- 15. SUPPLEMENTARY NOTES ------------------------------------------------------------------------------- 16. ABSTRACT The SOLAR-A Mission is a program of the Institute of Space and Astronautical Science (ISAS), the Japanese agency for scientific space activity. The SOLAR-A satellite was launched on August 30, 1991, to study high energy phenomena in solar flares. As an international cooperative agreement, Lockheed, under NASA contract, is providing a scientific investigation and has prepared the Soft X-ray Telescope (SXT), one of the two primary experiments of the mission. --------------------------------------|---------------------------------------- 17. KEY WORDS (SUGGESTED BY | 18. DISTRIBUTION STATEMENT AUTHOR(S)) Solar-A, X-ray, CCD, | Space Science, Solar Physics ------------------------|-------------|----------|-----------------|----------- 19. SECURITY CLASSIF. | 20. SECURITY CLASSIF. | 21. NO OF PAGES |22. PRICE (OF THIS REPORT) | (OF THIS PAGE) | | None | None | 7 | ------------------------|------------------------|-----------------|----------- For sale by: Superintendent of Documents, U.S. Government Printing Office From lemen Wed Aug 9 14:58:55 1995 Received: by sxt7.space.lockheed.com; (5.65/1.1.8.2/21Feb95-1254PM) id AA25724; Wed, 9 Aug 1995 14:58:38 -0700 Date: Wed, 9 Aug 1995 14:58:38 -0700 From: James R. Lemen Message-Id: <9508092158.AA25724@sxt7.space.lockheed.com> To: James.R.Janesick@ccmail.jpl.nasa.gov, Stefan.Waldherr@ccmail.Jpl.Nasa.Gov, Stewart.A.Collins@ccmail.JPL.NASA.Gov, Wendell.L.Keller@ccmail.Jpl.Nasa.Gov, acton@sxt4.oscs.montana.edu, agabriel@solar.stanford.edu, alexande@sxt4.oscs.montana.edu, bruner, clark_ron@mm.rdd.lmsc.lockheed.com, freeland, friedlaender@sag.space.lockheed.com, jaynes@univrs.decnet.lockheed.com, jimm@sunspot.ssl.berkeley.edu, jlc@mssl.ucl.ac.uk, jlintott@smtpgmgw.ossa.hq.nasa.gov, jml@sunspot.ssl.berkeley.edu, john.owens@msfc.nasa.gov, kharvey@noao.edu, klimchuk@bandit.nrl.navy.mil, leh@misr-fsw.jpl.nasa.gov, lemen, leonard_laura@mm.rdd.lmsc.lockheed.com, linford, mariska@aspen.nrl.navy.mil, morrison, nitta, ogawara@astro.isas.ac.jp, roethig@sag.space.lockheed.com, sharadk@sunspot.ssl.berkeley.edu, slater, strong, sturrock@flare.stanford.edu, wwagner@solar.stanford.edu, yohkoh@koa.ifa.hawaii.edu Subject: SXT July 1995 Progress Report Status: R Page 1 PROGRESS REPORT THE SOLAR-A SOFT X-RAY TELESCOPE (SXT) PROGRAM (CONTRACT NAS8-37334) (for July 1995) OVERVIEW The YOHKOH Mission is a program of the Japanese Institute of Space and Astronautical Science (ISAS) with collaboration by the U. S. National Aeronautics and Space Administration and the U. K. Science and Engineering Research Council. The YOHKOH satellite was launched on 30 August 1991 from Kagoshima Space Center (KSC) in Japan. The purpose of this mission is to study high energy phenomena in solar flares and the Sun's corona. Under an international cooperative agreement, Lockheed, under NASA contract, is providing a scientific investigation using the Soft X-ray Telescope (SXT), one of the primary experiments of the mission. The SXT was developed at the Lockheed Palo Alto Research Laboratory in cooperation with the National Astronomical Observatory of Japan, and the Institute for Astronomy of the University of Tokyo. MAJOR PROGRAMMATIC ACTIVITIES IN THE MONTH The RFP for the extended mission was received towards the end of the month. The proposed effort will cover a total of four years: two years are for operations, and all four years are for data analysis. The original Co-I's are also included in the extended program. << Solar Activity >> The solar activity remained low during the month. There were only a few flares during the month, mostly B class, although there was one reported C class flare on 2 July. There have been typically two or three active regions present most of the time. AR 7890 produced six B-class flares and some jets were successfully observed in the partial frame data. SXT is now observing numerous bright points and some large-scale coronal eruptions. The SXT observing program has been adapted to the quieter solar conditions by carrying out longer exposure observations of the diffuse corona and by coordinated programs with Mees Observatory, Hawaii, to monitor large filaments in the hopes of observing a filament eruption. << Campaigns >> After a busy, campaign-filled June, July was fairly quiet. Some preparation work was done for the upcoming Spartan flight which was Page 2 later postponed. The filament monitoring campaign was conducted with Mees Observatory during appropriate times. << Science >> There continues to be much interest in the pixon method for reconstructing HXT images. Nitta and Yaji have recently used Tom Metcalf's code to study an M1 flare that was observed on 21 August 1992 and which allegedly had a super-hot (34 MK) component. By comparing SXT and HXT images they have discovered that the super-hot component is formed in a loop structure that is different from the main, 10-20 MK component of the flare. They have written a paper that has been submitted to Ap J Letters. << Publications>> The following is an incomplete listing of work in progress on papers and presentations that include scientists that are supported by the NASA SXT contract. - Papers Published (1) - "Detection of Nonthermal Radio Emission from Coronal X-ray Jets," M. R. Kundu, J.-P. Raulin, N. Nitta, H. S. Hudson, M. Shimojo, K. Shibata, and A. Raoult, 1995, ApJ (Letters), 447, L135. - Papers accepted (4) - "Microwave and Hard X-ray Observations of Footpoint Emission from Solar Flares," M. R. Kundu, N. Nitta, S. M. White, K. Shibasaki, S. Enome, T. Sakao, T. Kosugi, and T. Sakurai (ApJ). "Joint Radio and Soft X-ray Imaging of an ``Anemone'' Active Region" A. Vourlidas, T. S. Bastian, N. Nitta, and M. J. Aschwanden (Sol Phys). "Metric Type III Bursts Associated with Soft X-ray Jets," J.-P. Raulin, M. R. Kundu, N. Nitta, H. S. Hudson, and A. Raoult (Sol Phys). "VLA and Yohkoh Observations of an M1.5 Flare," N. Gopalswamy, J.-P. Raulin, M. R. Kundu, N. Nitta, J. R. Lemen, R. Herrmann, D. Zarro, and T. Kosugi (ApJ). - Papers Submitted (1) - "A Super-hot Flare Observed by Yohkoh," Nariaki Nitta and Kentaro Yaji (ApJ Letters). - Presentations (0) - - Abstracts submitted(0) - Page 3 << Public Use of SXT Images >> Keith Strong arranged for a producer and a camera crew from the Discovery channel to visit Lockheed to discuss the Yohkoh/SXT project. Keith was filmed during an interview in which he described the research that is done with Yohkoh data. Greg Slater worked with Keith to provide special SXT sequences which the camera crew were able to directly copy from the Sony laser disk. The SXT engineering model even made a cameo appearance with some of the members of the laboratory. A seven minute program will be prepared and broadcast later this year. << Yohkoh Operations and Health >> Yohkoh and the SXT continue to function very well. No significant degradation in the instrument has occurred since the loss of the front thermal shield in 1992. SXT experienced a normal level of Single Event Upset (SEU) events during the month: SXT bitmap error July 5 Pass 2; 950705-0514 recovered in the same pass SXT bitmap error July 12 Pass 1; 950712-0205) recovered in the same pass SXT bitmap error July 13 Pass 1; 950731-1135 recovered in the Passes 2&3 The overlap between Yohkoh and ASCA currently is very severe, but the loss of data has partially been minimized, thanks to the recent addition of the Santiago station. Page 4 << Data Flow >> ------------------------------------------------------------------------------ Month Full Frame Images Observing Region Images Received Lost Received Lost Loss % QT FL Tot Thru Apr-93 120916 57359 445812 220608 666420 241787 26.47 May-93 8571 3950 41832 7518 49350 21971 30.81 Jun-93 7340 2589 64545 12539 77084 26299 25.44 Jul-93 8259 3650 47561 5352 52913 24213 31.39 Aug-93 7628 3638 30705 3563 34268 17436 33.72 Sep-93 6875 2899 22697 5600 28297 11252 28.45 Oct-93 7474 3657 33782 7548 41330 20104 32.72 Nov-93 8504 3864 42953 5849 48802 23896 32.87 Dec-93 5898 3047 21128 13297 34425 13001 27.41 Jan-94 6934 2804 28567 10960 39527 13746 25.80 Feb-94 7000 2840 23021 5819 28840 11257 28.07 Mar-94 7736 2627 69273 3733 73006 31464 30.12 Apr-94 6142 2741 22707 3390 26097 12338 32.10 May-94 7070 2679 25260 3040 28300 10862 27.74 Jun-94 7417 2738 36795 1996 38791 15760 28.89 Jul-94 7488 2941 50540 3275 53815 24153 30.98 Aug-94 7370 2337 35067 3993 39060 13485 25.66 Sep-94 7079 2552 25131 2855 27986 10677 27.62 Oct-94 7244 2497 25868 5884 31752 10319 24.53 Nov-94 6569 1941 26243 1956 28199 9293 24.79 Dec-94 6429 2456 26763 2583 29346 11904 28.86 Jan-95 6870 2349 26103 1699 27802 10211 26.86 Feb-95 6556 2545 23635 3825 27460 10111 26.91 Mar-95 5915 2082 21485 3448 24933 8485 25.39 Apr-95 6244 2266 22946 4493 27439 9688 26.09 May-95 7084 2884 29617 2647 32264 15331 32.21 Jun-95 7210 3087 25251 307 25558 12045 32.03 Jul-95 266 101 933 40 973 395 28.87 Aug-95 0 0 0 0 0 0 0.00 Total 306088 131120 1296220 347817 1644037 641483 28.07 Number of Full Frame Images Received: 306088 Number of Observing Region Images Received: 1644037 Total: 1950125 Approximate Number of Shutter Moves/CCD Readouts: 3409864 NOTES: * The loss of images is mainly due to BDR overwrites, but there are also occasional DSN dumps which are lost. * It is common to have observing regions which contain more than 64 lines, which requires multiple exposures to make a single observing region image. This is why the number of shutter moves is larger than the number of images received plus those lost. Page 5 << Engineering Summary Table >> -------------------------------------------------------------------------------- Month Avg Dark Level # of Dark Spikes CCD Warmings Front Optical (DN) (e/sec) Over 48 Over 64 High / # Support Trans Temp /Days Temp (%) May-93 43.45 485.3 16405 2357 17.3 N/A Jun-93 44.03 507.2 20037 2531 16.3 N/A Jul-93 44.46 523.4 23020 2600 22.5 / 2 17.7 N/A Aug-93 44.20 513.6 21319 2598 25.2 / 3 17.2 N/A Sep-93 45.07 546.2 27469 2745 17.5 N/A Oct-93 45.40 558.6 31684 2982 17.7 N/A Nov-93 45.33 555.8 32047 3210 23.8 / 3 19.7 N/A Dec-93 45.92 578.1 38515 3101 19.2 N/A Jan-94 46.00 580.9 39074 3088 22.5 / 2 20.3 N/A Feb-94 46.03 582.1 40449 3246 19.3 N/A Mar-94 45.92 578.0 39715 3420 18.2 N/A Apr-94 45.97 579.9 41302 3721 25.2 / 3 17.8 N/A May-94 46.25 590.3 45476 3557 18.3 N/A Jun-94 45.83 574.6 39340 3547 17.8 N/A Jul-94 46.76 609.5 53417 3990 18.2 N/A Aug-94 46.98 617.6 57624 4050 25.2 / 3 18.2 N/A Sep-94 47.07 620.9 58580 4028 18.3 N/A Oct-94 47.34 631.3 64974 4346 19.0 N/A Nov-94 47.64 642.4 70877 4703 20.4 N/A Dec-94 47.82 649.1 74246 4917 21.5 N/A Jan-95 48.55 676.7 89758 5457 20.0 N/A Feb-95 48.70 682.1 92457 5781 25.2 / 3 20.5 N/A Mar-95 48.35 668.9 85527 5271 19.4 N/A Apr-95 48.72 682.8 93904 5627 19.1 N/A May-95 48.73 683.4 94000 5820 18.8 N/A Jun-95 49.08 696.3 100780 6281 19.6 N/A Jul-95 N/A N/A N/A N/A 18.7 N/A Aug-95 N/A N/A N/A N/A 0.0 N/A NOTES: * The dark current calculations are using full half resolution 2.668 sec images not taken in during the SAA. The dark current rate assumes a "fat zero" of 30.5 DN and a gain of 100 e/DN. * The entrance filter failure of 13-Nov-92 eliminated the capability of taking optical images, so the optical transmission is not available after Nov-92. It also caused an increase in the dark current signal, however some of the increase shown here is an increase in the readout noise and is not a function of exposure duration. Page 6 << Personnel Travel >> SXT Foreign Travel between 1-JUL-95 and 31-JUL-95 ALEXANDER 1-JUL-95 * 31-JUL-95 * 31 (total of 31 days) HUDSON 3-JUL-95 31-JUL-95 * 29 (total of 29 days) LEMEN 1-JUL-95 31-JUL-95 31 (total of 31 days) LINFORD 1-JUL-95 * 19-JUL-95 19 (total of 19 days) WEBER 27-JUL-95 31-JUL-95 * 5 (total of 5 days) METCALF 1-JUL-95 * 6-JUL-95 6 (total of 6 days) ---------------------------------------------------------------- Grand Total of 121 days for 6 people NOTE: The "*" signifies travel that actually ends after 31-JUL-95 SXT Foreign Travel between 1-AUG-95 and 31-AUG-95 ALEXANDER 1-AUG-95 * 2-AUG-95 2 (total of 2 days) HUDSON 1-AUG-95 * 7-AUG-95 7 23-AUG-95 31-AUG-95 * 9 (total of 16 days) NITTA 25-AUG-95 31-AUG-95 * 7 (total of 7 days) SLATER 14-AUG-95 31-AUG-95 * 18 (total of 18 days) WEBER 1-AUG-95 * 31-AUG-95 * 31 (total of 31 days) JIAO 1-AUG-95 28-AUG-95 28 (total of 28 days) ---------------------------------------------------------------- Grand Total of 102 days for 6 people NOTE: The "*" signifies travel that actually ends after 31-AUG-95 Respectfully submitted, James R. Lemen Frank M. Friedlaender Page 7 ------------------------------------------------------------------------------- NASA REPORT DOCUMENTATION PAGE (IN LIEU OF NASA FORM 1626) --------------------|--------------------------|------------------------------- 1. REPORT NO. | 2. GOVERNMENT | 3. RECIPIENT'S DR-01 | ACCESSION NO. | CATALOG NO. --------------------|--------------------------|------------------------------- 4. TITLE AND SUBTITLE | 5. REPORT DATE Monthly progress report - for the month of | 9 August 1995 July 1995 |------------------------------- | 6. PERFORMING ORG | CODE: O/91-30 -----------------------------------------------|------------------------------- 7. AUTHOR(S) | 8. PERFORMING ORGANIZA- J. R. Lemen | TION REPORT NO: F. M. Friedlaender | |------------------------------- -----------------------------------------------|10. WORK UNIT NO. 9. PERFORMING ORGANIZATION NAME AND ADDRESS | Lockheed Palo Alto Research Labs B/252 |------------------------------- Solar & Astrophysics Laboratory O/91-30 |11. CONTRACT OR GRANT NO. 3251 Hanover Street, Palo Alto Ca. 94304 | NAS8 - 37334 -----------------------------------------------|------------------------------- 12. SPONSORING AGENCY NAME AND ADDRESS |13. TYPE OF REPORT AND Marshall Space Flight Center (Explorer Program)| PERIOD COVERED Huntsville Alabama 35812 | Progress report for the month | of July 1995 |------------------------------- |14. SPONSORING AGENCY | CODE MSFC / AP32 -----------------------------------------------|------------------------------- 15. SUPPLEMENTARY NOTES ------------------------------------------------------------------------------- 16. ABSTRACT The SOLAR-A Mission is a program of the Institute of Space and Astronautical Science (ISAS), the Japanese agency for scientific space activity. The SOLAR-A satellite was launched on August 30, 1991, to study high energy phenomena in solar flares. As an international cooperative agreement, Lockheed, under NASA contract, is providing a scientific investigation and has prepared the Soft X-ray Telescope (SXT), one of the two primary experiments of the mission. --------------------------------------|---------------------------------------- 17. KEY WORDS (SUGGESTED BY | 18. DISTRIBUTION STATEMENT AUTHOR(S)) Solar-A, X-ray, CCD, | Space Science, Solar Physics ------------------------|-------------|----------|-----------------|----------- 19. SECURITY CLASSIF. | 20. SECURITY CLASSIF. | 21. NO OF PAGES |22. PRICE (OF THIS REPORT) | (OF THIS PAGE) | | None | None | 7 | ------------------------|------------------------|-----------------|----------- For sale by: Superintendent of Documents, U.S. Government Printing Office