Date: Sun, 30 Jan 94 04:30:34 PST
From: Ham-Space Mailing List and Newsgroup <ham-space@ucsd.edu>
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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
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----------------------------------------------------------------------
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
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