Date: Sun, 30 Jan 94 04:30:34 PST From: Ham-Space Mailing List and Newsgroup Errors-To: Ham-Space-Errors@UCSD.Edu Reply-To: Ham-Space@UCSD.Edu Precedence: Bulk Subject: Ham-Space Digest V94 #13 To: Ham-Space Ham-Space Digest Sun, 30 Jan 94 Volume 94 : Issue 13 Today's Topics: ARLS003 New OSCAR on soon Daily IPS Report - 28 Jan 94 InstantTrack Fix New Meteor? Where? question about a calculation of satellite orbit Weekly IPS Report - 28 Jan 94 Send Replies or notes for publication to: Send subscription requests to: Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Ham-Space Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-space". We trust that readers are intelligent enough to realize that all text herein consists of personal comments and does not represent the official policies or positions of any party. Your mileage may vary. So there. ---------------------------------------------------------------------- Date: Wed, 26 Jan 94 13:34:57 EDT From: unix.sri.com!headwall.Stanford.EDU!agate!howland.reston.ans.net!sol.ctr.columbia.edu!destroyer!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@hplabs.hp.com Subject: ARLS003 New OSCAR on soon To: ham-space@ucsd.edu SB SPACE @ ARL $ARLS003 ARLS003 New OSCAR on soon ZCZC AS47 QST de W1AW Space Bulletin 003 ARLS003 ------------------------------ Date: 28 Jan 94 02:23:11 GMT From: cs.utexas.edu!sdd.hp.com!think.com!cass.ma02.bull.com!syd.bull.oz.au!brahman!tmx!basser.cs.su.oz.au!metro!news.ci.com.au!eram!dave@rutgers.rutgers.edu Subject: Daily IPS Report - 28 Jan 94 To: ham-space@ucsd.edu IPS RADIO AND SPACE SERVICES AUSTRALIA Daily Solar And Geophysical Report Issued at 2330 UT 27 January 1994 Summary for 27 January and Forecast up to 30 January IPS Warning 02 was issued on 24 Jan and is still current. ----------------------------------------------------------- 1A. SOLAR SUMMARY Activity: moderate Flares Max Fadeout Begin End Freq. Sectors M2/SN 0510UT confirmed 0508UT 0540UT lower E. Asia/Aust. Observed 10.7 cm flux/Equivalent Sunspot Number : 120/072 1B. SOLAR FORECAST 28 January 29 January 30 January Activity Low to moderate Low to moderate Low to moderate Fadeouts Possible Possible Possible Forecast 10.7 cm flux/Equivalent Sunspot Number : 120/072 1C. SOLAR COMMENT None. ----------------------------------------------------------- 2A. MAGNETIC SUMMARY Geomagnetic field at Learmonth : unsettled with active levels from 15-18UT Estimated Indices : A K Observed A Index 26 January Learmonth 13 3233 3332 Fredericksburg 15 17 Planetary 22 17 2B. MAGNETIC FORECAST DATE Ap CONDITIONS 28 Jan 18 Mostly unsettled with an isolated active period. 29 Jan 12 Quiet to unsettled. 30 Jan 08 Quiet to unsettled. 2C. MAGNETIC COMMENT None. 3A. GLOBAL HF PROPAGATION SUMMARY LATITUDE BAND DATE LOW MIDDLE HIGH 27 Jan fair-normal fair-normal fair-normal PCA Event : None. 3B. GLOBAL HF PROPAGATION FORECAST LATITUDE BAND DATE LOW MIDDLE HIGH 28 Jan fair-normal fair-normal fair-normal 29 Jan normal fair-normal fair-normal 30 Jan normal fair-normal normal 3C. GLOBAL HF PROPAGATION COMMENT Chance of fadeout on daylight circuits. ----------------------------------------------------------- 4A. AUSTRALIAN REGION IONOSPHERIC SUMMARY MUFs at Sydney were mostly 15-30% above monthly predicted values, and 30-50% above from 08-10UT and 13-14UT. Sporadic E may have affected F layer communications during daylight hours. A fadeout in response to the M2 flare occurred from 0508-0540UT. T index: 81 4B. AUSTRALIAN REGION IONOSPHERIC FORECAST DATE T-index MUFs 28 Jan 45 Near predicted to 20% enhanced. 29 Jan 45 Near predicted to 20% enhanced. 30 Jan 45 Near predicted to 20% enhanced. Predicted Monthly T Index for January is 30. 4C. AUSTRALIAN REGION COMMENT Sporadic E may affect F layer communications, particularly during daylight hours. Chance of fadeout on daylight circuits. -- Dave Horsfall (VK2KFU) VK2KFU @ VK2OP.NSW.AUS.OC PGP 2.3 dave@esi.COM.AU ...munnari!esi.COM.AU!dave available ------------------------------ Date: 29 Jan 1994 23:12:58 GMT From: library.ucla.edu!agate!howland.reston.ans.net!torn!news.ccs.queensu.ca!news.rmc.ca!somers@network.ucsd.edu Subject: InstantTrack Fix To: ham-space@ucsd.edu Some time ago, a fix for InstantTrack appeared on BBSs to fix the problem of the new checksums in 2-line elsets. I got the fix from a BBS and applied it and it worked fine. However, I recently reloaded my InstantTrack and realized I cannot find the "fix" program. Anyone know of an Internet or BBS location where I could get it. Thanks. ------------------------------ Date: Sat, 29 Jan 94 21:47:00 +0200 From: usc!elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!howland.reston.ans.net!pipex!sunic!trane.uninett.no!news.eunet.no!nuug!news.eunet.fi!gate.compart.fi!compart!leo.wikholm@network.ucsd.edu Subject: New Meteor? Where? To: ham-space@ucsd.edu According to AW&ST the new Meteor 3 satellite will be launched in the end of January. Does anyone know when was this launch happened and what is the frequency of the satellite? Leo Wikholm e-mail: leo.wikholm@compart.fi ------------------------------ Date: 24 Jan 1994 15:19:49 -0800 From: usc!howland.reston.ans.net!cs.utexas.edu!swrinde!sgiblab!sgigate.sgi.com!olivea!apple.com!amd!amdahl!hip-hop.sbay.org!not-for-mail@network.ucsd.edu Subject: question about a calculation of satellite orbit To: ham-space@ucsd.edu The question is at end. Here is the description of the problem I am having. I was trying to calculate the longitude for oscar 21. I got the following formulas from a friend of mine. Lon[W] = {[(JxR-D)x24+6.6285792]*15}-RAx Where J is the julian day (in days) with out year, that is, something like 24.8777day. R is the earth rotation rate 1.002737851 rev/day. D is the integral value of JxR. (JxR-D)x24+6.6285792 is the Greenwich Sidereal Time (GST) in hours, thus [(JxR-D)x24+6.6285792]*15 is GST in degrees. RAx is the RA at current time. RAx = RA0 + [Jx-J0]x(d(RA)/dt) RA0 and J0 are the RA and Julian day at epoch. d(RA)/dt is the rate of change of RA. Here are my calculations: At PST time 12:00, or UTC time 20:00 today (UTC date Jan 24), the Julian day (UTC) is 25.83333 therefore I calculated (JxR-D)*24+6.6285792, GST in hours, to be 28.32605 subtracting since it is greater than 24, I subtracted 24 from it, and got 4.32605 multiply by 15 I got 64.89070 which is the GST in degrees. Then I calculated the RAx. I used the data (got from the net) with epoch 94019.17209926. RA at that point is 252.9794. In order to calculate d(RA)/dt, I had to find the data with epoch 94012.62069919. RA at that point is 257.8282. Thus the d(RA)/dt is approximately (252.9794-257.8282)/(19.17209926-12.62069919) = -0.74012 Therefore the RAx at 25.83333 would be 252.9794 + (25.83333-19.17209926)x(-0.74012) = 248.049312108. Now the lon[w] should be the difference between GST in degrees and RAx. GST in degrees - RAx = 64.89070 - 248.049312108 = -183.15861 degree W. So here is the problem, my tracking software, PCTRACK, predicted a lon of 145.1 east. I don't see a correlation between the two numbers. Did I use the wrong formula? Are the formulas the same for all sat? Is Oscar 21 somewhat different? All information, answers are welcome. Thanks Benjie ------------------------------ Date: 28 Jan 94 02:24:05 GMT From: cs.utexas.edu!sdd.hp.com!think.com!cass.ma02.bull.com!syd.bull.oz.au!brahman!tmx!basser.cs.su.oz.au!metro!news.ci.com.au!eram!dave@rutgers.rutgers.edu Subject: Weekly IPS Report - 28 Jan 94 To: ham-space@ucsd.edu 21 JANUARY - 27 JANUARY 1994 Issue No 04 Date of issue: 28 January, 1994 INDICES: Date 21 22 23 24 25 26 27 10cm 111 113 118 129 132 128 120 A 07 09 07 03 05 17 (15) T 38 53 75 73 82 56 81 SUMMARY OF ACTIVITY January 21 Solar activity was very low. The geomagnetic field at Learmonth (WA) was quiet to unsettled. Ionospheric F2 critical frequencies at Sydney were near predicted monthly values. January 22 Solar activity was low. The geomagnetic field at Learmonth (WA) was quiet to unsettled. Ionospheric F2 critical frequencies at Sydney were slightly above predicted monthly values. January 23 Solar activity was low. The geomagnetic field at Learmonth (WA) was quiet to unsettled. Ionospheric F2 critical frequencies at Sydney were about 15% above predicted monthly values. January 24 Solar activity was low. The geomagnetic field at Learmonth (WA) was quiet. Ionospheric F2 critical frequencies at Sydney were about 15% above predicted monthly values. .SK January 25 Solar activity was moderate, with an M1/1N flare at 1836UT. The geomagnetic field at Learmonth (WA) was quiet. Ionospheric F2 critical frequencies at Sydney were 15-30% enhanced 00-14 UT, then near predicted monthly values. January 26 Solar activity was moderate, with an M1/0F flare at 0136UT. The geomagnetic field at Learmonth (WA) was mostly unsettled with active periods from 06-09UT and 12-15UT. Ionospheric F2 critical frequencies at Sydney were near predicted with 15-40% enhancements from 09-14UT and at 18UT. January 27 Solar activity was moderate, with an M2/0N flare at 0510UT. The geomagnetic field at Learmonth (WA) was unsettled with active levels from 15-18UT. Ionospheric F2 critical frequencies at Sydney were mostly 15-30% above monthly predicted values, 30-50% above from 08-10UT and 13-14UT. Sporadic E may have affected F layer communications during daylight hours. A fadeout in response to the M2 flare occurred from 0508-0540UT. FORECAST FOR THE NEXT WEEK (28 - 3 FEBRUARY) SOLAR: Low to moderate GEOMAGNETIC: Quiet to unsettled IONOSPHERIC: Near predicted to 20% above monthly predicted values. Possibility of fadeouts on daylight circuits. -- Dave Horsfall (VK2KFU) VK2KFU @ VK2OP.NSW.AUS.OC PGP 2.3 dave@esi.COM.AU ...munnari!esi.COM.AU!dave available ------------------------------ Date: (null) From: (null) SB SPACE ARL ARLS003 ARLS003 New OSCAR on soon New Oscar on soon Amateur satellite Korean Oscar 25 (KO-25) is expected to be available for use beginning about February 1. The satellite, launched last fall and originally designated KITSAT-B, has been under test since then. KO-25 is a 9600 bit/s packet store-and-forward satellite similar to KO-23, with uplinks on 2 meters and downlinks on 70 cm. KO-25's builder, the Korean Advanced Institute of Science and Technology (KAIST), thanks potential users of the satellite for their cooperation up to now in not attempting to use the KO-25 BBS. The Institute said that testing is expected to continue after February 1, and there may be interruptions of service, but they are not expected to cause any ''serious problems.'' ''We hope you enjoy our new star in space,'' said Hyungshin Kim of KAIST. More information on KO-25 was in October 1993 QST, page 98. NNNN /EX ------------------------------ End of Ham-Space Digest V94 #13 ******************************