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From wang!elf.wang.com!ucsd.edu!info-hams-relay Thu Apr 11 15:51:02 1991 remote from tosspot
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Message-Id: <9104111207.AA16384@ucsd.edu>
Date: Thu, 11 Apr 91 05:07:09 PDT
From: Info-Hams Mailing List and Newsgroup <info-hams-relay@ucsd.edu>
Reply-To: Info-Hams@ucsd.edu
Subject: Info-Hams Digest V91 #288
To: Info-Hams@ucsd.edu
Info-Hams Digest Thu, 11 Apr 91 Volume 91 : Issue 288
Today's Topics:
FSTV
Index to the Supplemental Archive
Kenwood radio control program for UNIX
SOLAR TERRESTRIAL FORECAST AND REVIEW
Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Info-Hams Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/info-hams".
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: 10 Apr 91 19:28:44 GMT
From: agate!bionet!uwm.edu!zaphod.mps.ohio-state.edu!wuarchive!emory!wa4mei!ke4zv!gary@ucbvax.berkeley.edu
Subject: FSTV
To: info-hams@ucsd.edu
In article <memo.895939@lynx.northeastern.edu> sehrlich@helios.northeastern.edu writes:
>Is it possible to receive Fast Scan TV [ATV / FSTV] through an HT
>capable of operation in the 430 - 440 Mhz segment of the 70cm band?
No. The IF bandwidth is orders of magnitude too narrow, 20 khz vs 6 Mhz.
>How about transmittion of FSTV?
You could modify the PA to allow plate modulation. Wouldn't be pretty.
>How about reception of FSTV on a scanner capable of receiving in the
>same area?
Same problem, IF too narrow.
Gary KE4ZV
------------------------------
Date: 10 Apr 91 21:54:11 GMT
From: agate!bionet!uwm.edu!caen!kuhub.cc.ukans.edu!zeus.unomaha.edu!acmnews@ucbvax.berkeley.edu
Subject: Index to the Supplemental Archive
To: info-hams@ucsd.edu
The following is the contents of the README index file under subdirectory
/pub/ham-radio on ftp.cs.buffalo.edu. Hats off to Devon Bowen for
maintaining this supplemental rec.radio.amateur archive.
Questions to bowen@cs.buffalo.edu
callbook.tar.Z - sources for the marvin callsign server v1.2
carf.db_fcc.Z - Canadian ham database in FCC format
carf.db_orig.Z - Canadian ham database in original format
docket_91-36 - information regarding the proposed scanner regs
elmers - list of elmers on the network
faq1 - Beginning Amateur Radio questions
faq2 - "Where can I find ..." questions
faq3 - Common Advanced and Technical questions
guide2newsgroups - description of USENET newsgroups dedicated to radio
hamstacks - information about the question pool stacks
mail_order - a database of electronic mail order shops
new_packeteers - helpful essays for new packeteers
----------------------------
73, Paul W. Schleck, KD3FU
ACMNEWS@zeus.unomaha.edu
------------------------------
Date: 10 Apr 91 19:36:08 GMT
From: lll-winken!elroy.jpl.nasa.gov!sdd.hp.com!uakari.primate.wisc.edu!aplcen!wb3ffv!ka3ovk!albers@ames.arpa
Subject: Kenwood radio control program for UNIX
To: info-hams@ucsd.edu
Does anyone know of a Kenwood roadio control program written for UNIX or
XENIX? I am looking for sorce code.
Jon
--
| Jon Albers, IRS, Information Systems Management, Support and Installation. |
| Office Symbols: ISM:S:S:SI voice: (202/FTS)535-3729 Packet: KA3OVK@N4QQ |
| UUCP:(media|teemc|tcsc3b2|ki4pv)!ka3ovk!albers ARPA: JALBERS@SIMTEL20 |
------------------------------
Date: 11 Apr 91 08:48:44 GMT
From: news-mail-gateway@ucsd.edu
Subject: SOLAR TERRESTRIAL FORECAST AND REVIEW
To: info-hams@ucsd.edu
--- SOLAR TERRESTRIAL FORECAST AND REVIEW ---
April 10 to April 20, 1991
Report Based In-Part from Data Obtained from the
Space Environment Services Center
Boulder Colorado
--------
SOLAR TERRESTRIAL REVIEW FOR 31 MARCH TO 10 APRIL
Solar activity during the period from 31 March to 10 April was high to
low. Region 6555 managed to spawn several major flares shortly before it
disappeared behind the eastern limb on 31 March/01 April. On 02 April,
Region 6562 spawned an M6.1/3B flare at 23:27 UT. This major flare was
associated with a strong Type IV sweep emission and was associated with
a SID/SWF. The optical counterpart of this flare was also impressive,
exhibiting a significant loop prominence system. Parallel ribbons were also
observed with this flare.
Since 02 April, solar activity became dormant. No M-class flares were
observed until late in the period. On 09 April, a weak class M1.0/1B flare
was observed from Region 6566 at 18:49 UT. Region 6566 was a small bipolar
region with very little complexity. However, new flux emergence within this
region increased activity and is believed responsible for producing the
M-class flare.
A satellite proton event at greater than 10 MeV began at 08:15 UT on 03
April and reached a peak flux of 52 pfu on 04 April. A Polar Cap Absorption
(PCA) event began at 08:45 UT on 04 April and reached a peak absorption level
of 2.2 dB's before ending shortly thereafter at 17:50 UT on 04 April. The
major class M6.1/3B flare of 02 April is believed responsible for these
events. The proton event decayed thereafter and ended at 06:45 UT on 06
April.
The geomagnetic field was at mostly unsettled to active levels
throughout the period. The only significant exception was on 04 April when
all latitudes experienced several periods of major geomagnetic storming, most
likely caused by the major class M6.1/3B flare of 02 April. Since 04 April,
geomagnetic conditions have been generally unsettled with isolated periods of
active conditions being observed over all latitudes.
An impressive display of auroral activity was observed on 04 April,
coincident with the sudden increase in geomagnetic activity due to the major
flare of 02 April. The activity was relatively short-lived, however. The
most intense activity was observed shortly after the SSC on 04 April for
several hours. Activity was not intense enough to be viewed over the lower
latitudes, although some isolated and unconfirmed reports of possible very
weak auroral activity was reported from a few low latitude stations on 04
April. Continual low to moderate auroral activity has been observed over the
northerly middle and high latitudes. Coronal-induced activity is most likely
the cause of this prolonged geomagnetic and auroral activity over these
regions.
HF radio propagation conditions have been generally good throughout the
period. The exception is 04 April, when some degradation was observed over
all latitudes. Sporadic and isolated substorm activity has produced
localized degraded conditions over several middle and low latitude
regions recently, particularly over the southern hemispheric regions.
Some isolated VHF auroral backscatter communications were reported on 04
April, coincident with the increased geomagnetic and auroral activity. Since
then, conditions have been unfavorable for auroral communications on the VHF
bands. SID enhancements were not possible due to the dormant nature of the
solar activity since 03 April.
SHORT TERM SOLAR TERRESTRIAL FORECAST
Solar activity is on the rise again. There are many small and
relatively inactive regions on the surface of the sun at the present time.
Region 6583 (N10E73 on 11 April) just recently rotated into view from the
east limb and is proving the be the most energetic region visible. It has
produced several low-level M-class flares lately. The two most recent
occurred at 03:44 UT and 20:30 UT on 10 April, reaching classes M1.3/1N and
M1.9/SF ratings respectively. This region also produced a weak Type II
sweep, apparently associated with a weak subflare. Region 6583 is still
too near to the eastern limb to discern any significant detail. However, it
appears to be a relatively small region with a slight amount of complexity
associated with it. It is expected to continue to develope and evolve, and
does not appear capable of producing any major flaring at the present time.
Region 6555 (the potent region which produced the plethora of X-class
flares late in March and was also responsible for the major geomagnetic storm
on 24-26 March) is due to return on 13 April. There is a possibility this
region could return in a form capable of producing occassional M-class
flaring. However, we believe that this region has probably decayed to the
point where flaring should be weak and of little significance. The east limb
will be monitored closely for the return of this region.
Geomagnetic activity is expected to remain at generally quiet to
unsettled levels over the next three days. An increase to unsettled to
active levels is possible beginning on 13 April, due to recurrent activity
and an expected reversal in the direction of the interplanetary magnetic
field. A southward directed field is expected to materialize over the next
several days (if it hasn't already materialized). Increased geomagnetic
instability is expected to occur thereafter. No middle latitude storming is
expected this week, barring any significant solar activity.
Auroral activity should become relatively dormant over the next week,
except over the high latitudes where low level auroral activity should
persist, mixed in with isolated periods of moderate activity. Some northerly
middle latitude areas should witness this weak auroral activity low over the
northern horizon under a dark sky. Activity should become slightly enhanced
beginning on or near 13 April due to recurrent solar corpuscular emissions
and also due in part to the expected change in interplanetary magnetic field
direction.
SUMMARY OF ALL ACTIVE REGIONS VISIBLE ON THE SOLAR DISK AS OF 11 APRIL
Region # Location LO Area Class LL Spots Magnetic Type
-------- -------- --- ---- ----- -- ----- -------------
6565 N09W82 037 0270 HSX 02 002 ALPHA
6566 S21W35 350 0270 DAO 10 021 BETA
6567 S11W44 359 0000 AXX 00 001 ALPHA
6568 S12W34 349 0060 CRO 04 005 BETA
6569 N05W16 331 0300 HSX 02 001 ALPHA
6570 S11W20 335 0030 BXO 04 004 BETA
6572 S20W71 026 0480 DAO 08 007 BETA
6577 N09W21 338 0030 AXX 01 001 ALPHA
6578 S19E07 308 0030 BXO 04 003 BETA
6579 N06E07 308 0060 CRO 05 005 BETA
6580 N29E28 287 0690 DAO 05 011 BETA
6581 N15E46 269 0090 CRO 06 003 BETA
6582 S25E57 258 0300 CSO 08 010 BETA
6583 N10E73 242 0660 CAO 04 007 BETA
6584 S13W55 010 0030 BXO 03 003 BETA
6585 S26E45 270 0000 AXX 00 001 ALPHA
6586 S25W10 325 0030 BXO 05 005 BETA
NOTES: Area is in million square kilometers. Angular extent (LL) and solar
longitude (LO) are in degree's. For more information regarding the terminology
used above, request the Glossary of Solar Terrestrial Terms from:
"oler@hg.uleth.ca".
H-ALPHA PLAGES WITHOUT SPOTS. LOCATIONS VALID AS OF 00:00 UT ON 11 APRIL
REGION LOCATION LO COMMENTS (IF ANY)
------ -------- --- -------------------------------
6573 S51W68 023 NONE
6575 S08W59 014
ACTIVE REGIONS DUE TO RETURN BETWEEN 11 APRIL AND 13 APRIL
Region Latitude Longitude (Helio.)
------ -------- ---------
6555 S24 186
6556 S12 191
NOTES: For definitions regarding the above, request the "Glossary of Solar
Terrestrial Terms" from "oler@hg.uleth.ca".
GRAPHICAL ANALYSIS OF RECENT PLANETARY (GLOBAL) GEOMAGNETIC ACTIVITY
Cumulative Geomagnetic Activity History
Peak Planetary Geomagnetic Activity during the past 96 hours
____________________________________________________________________
| EXTREMELY SEVERE | | | | | HIGH |
| VERY SEVERE STORM | | | | | HIGH |
| SEVERE STORM | | | | | MODERATE |
| MAJOR STORM | | | | | LOW - MOD. |
| MINOR STORM | | | | | LOW |
| VERY ACTIVE | | | | * | NONE |
| ACTIVE |*** * | ** | ****** | **** | NONE |
| UNSETTLED |********|********|********|********| NONE |
| QUIET |********|********|********|********| NONE |
| VERY QUIET |********|********|********|********| NONE |
|-------------------|--------|--------|--------|--------|------------|
| Geomagnetic Field | Sun. | Mon. | Tue. | Wed. | Anomaly |
| Conditions | Given in 3-hourly UT intervals | Intensity |
|____________________________________________________________________|
NOTES:
The data above represents planetary geomagnetic activity. Data from
many magnetic observatories around the world are used in constructing the
above chart. The first graph line for each day represents geomagnetic
activity which occurred between 00 UT and 03 UT. The second graph line
represents activity which occurred between 03 UT and 06 UT, etc. For
information regarding the interpretation and/or use of these charts, send
a request for the document "Understanding Solar Terrestrial Reports" to:
oler@hg.uleth.ca.
PLANETARY 10-DAY GEOMAGNETIC ACTIVITY OUTLOOK (11 APRIL - 20 APRIL)
________________________________________________________________________
| EXTREMELY SEVERE | | | | | | | | | | | HIGH |
| VERY SEVERE STORM | | | | | | | | | | | HIGH |
| SEVERE STORM | | | | | | | | | | | MODERATE |
| MAJOR STORM | | | | | | | | | | | LOW - MOD. |
| MINOR STORM | | | | | | | | | | | LOW |
| VERY ACTIVE | | | | | | | | | | | NONE |
| ACTIVE | | | | | | | | * |** |** | NONE |
| UNSETTLED | * | * |***|***|***|***|***|***|***|***| NONE |
| QUIET |***|***|***|***|***|***|***|***|***|***| NONE |
| VERY QUIET |***|***|***|***|***|***|***|***|***|***| NONE |
|-------------------|---|---|---|---|---|---|---|---|---|---|------------|
| Geomagnetic Field |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| Anomaly |
| Conditions | Given in 8-hour intervals | Intensity |
|________________________________________________________________________|
CONFIDENCE LEVEL: 70%
NOTES:
Predicted geomagnetic activity is based heavily on recurrent
phenomena. Transient energetic solar events cannot be predicted reliably over
periods in excess of several days. Hence, there may be some deviations from
the predictions due to the unpredictable transient solar component.
GRAPHICAL ANALYSIS OF SOLAR ACTIVITY OVER THE PAST 60 DAYS
Cumulative Graphical Analysis of
Solar Activity
____________________________________________________________
310| *F | HIGH
300| ****F F = Major Flare(s) | HIGH
289| ****F | HIGH
279| *****F | HIGH
269| *****F* F | HIGH
258| *******F* FF F * | HIGH
248| *******F** FFFFFFF * | Moderate
237| *******F** FF*FFFFFFF *F | Moderate
227| *******F*** F FFF*FFFFFFFF*FF | Moderate
217| *******F**** F ***FFF*FFFFFFFF*FF *| Moderate
206| *********F******FF*FF***FFF*FFFFFFFF*FF *| Moderate
196| *********F******FF*FF***FFF*FFFFFFFF*FF** * *** **| Moderate
185| *************F******FF*FF***FFF*FFFFFFFF*FF**F*F*F***** **| Low
175|***************F******FF*FF***FFF*FFFFFFFF*FF**F*F*F********| Low
165|***************F******FF*FF***FFF*FFFFFFFF*FF**F*F*F********| Low
------------------------------------------------------------
Cumulative 60 day Solar Activity Record
Start Date: February 10, 1990
NOTES:
Left-hand column digits represent the 10.7 cm solar radio flux
obtained from Ottawa. The right-hand column describes the relative solar
activity for that period based on the average number of major and minor
flares that can be expected for related solar flux values. Plot lines
labeled with the letter "F" represent days where at least one major flare
occurred (ie. class M5 or greater flare).
GRAPHICAL 20-DAY SOLAR ACTIVITY PREDICTION
Solar Activity
_________________________________________________________________
| 260 | | | | | | | | | | | | | | | | | | | | |
| 255 | | | | | | | |**|**| | | | | | | | | | | |
| 250 | | | | | |**|**| | |**|**| | | | | | | | | |
| 245 | | | |**|**| | | | | | |**|**| | | | | | | |
| 240 | | |**| | | | | | | | | | |**| | | | | | |
| 235 | |**| | | | | | | | | | | | |**| | | | | |
| 230 |**| | | | | | | | | | | | | | |**| | | | |
| 225 | | | | | | | | | | | | | | | | |**| | | |
| 220 | | | | | | | | | | | | | | | | | |**| | |
| 215 | | | | | | | | | | | | | | | | | | |**| |
| 210 | | | | | | | | | | | | | | | | | | | |**|
| 205 | | | | | | | | | | | | | | | | | | | | |
| 200 | | | | | | | | | | | | | | | | | | | | |
|-----|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|--|
|Solar|12|13|14|15|16|17|18|19|20|21|22|23|24|25|26|27|28|29|30|01|
|Flux | April |
-----------------------------------------------------------------
CONFIDENCE LEVEL: 60%
HF RADIO SIGNAL PROPAGATION PREDICTIONS (11 APRIL - 20 APRIL)
High Latitude Paths
________________________________________________________
| EXTREMELY GOOD | | | | | | | | | | |
| VERY GOOD | | | | | | | | | | |
CONFIDENCE | GOOD | | | | | | | | | | |
LEVEL | FAIR |***|***|***|***|***|***|* *|* *|* *| *|
------- | POOR | | | | | | | * | * | * |** |
65% | VERY POOR | | | | | | | | | | |
| EXTREMELY POOR | | | | | | | | | | |
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| QUALITY | Given in 8-Hour UT Intervals |
--------------------------------------------------------
Middle Latitude Paths
________________________________________________________
| EXTREMELY GOOD | | | | | | | | | | |
| VERY GOOD | | | | | | | | | | |
CONFIDENCE | GOOD |***|***|***|***|***|***|* *|* *|* *|* *|
LEVEL | FAIR | | | | | | | * | * | * | * |
------- | POOR | | | | | | | | | | |
65% | VERY POOR | | | | | | | | | | |
| EXTREMELY POOR | | | | | | | | | | |
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| QUALITY | Given in 8-Hour UT Intervals |
--------------------------------------------------------
Low Latitude Paths
________________________________________________________
| EXTREMELY GOOD | | | | | | | | | | |
| VERY GOOD | *| *| *| | | | | | | |
CONFIDENCE | GOOD |** |** |** |***|***|***|***|***|* *|* *|
LEVEL | FAIR | | | | | | | | | * | * |
------- | POOR | | | | | | | | | | |
70% | VERY POOR | | | | | | | | | | |
| EXTREMELY POOR | | | | | | | | | | |
|----------------|---|---|---|---|---|---|---|---|---|---|
| PROPAGATION |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| QUALITY | Given in 8-Hour UT Intervals |
--------------------------------------------------------
NOTES:
High latitudes >= 55 degree's north latitude
Middle latitudes >= 40 < 55 degree's north latitude
Low latitudes < 40 degree's north latitude
POTENTIAL VHF DX PROPAGATION PREDICTIONS (11 APRIL - 20 APRIL)
INCLUDES SID AND AURORAL BACKSCATTER ENHANCEMENT PREDICTIONS
HIGH LATITUDES
__________________________________________________ ___________________
| SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT |
| QUALITY |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |S|M|T|W|T|F|S|S|M|T|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*|
|ABOVE NORM| | | | | | | | | | | 20%|*|*|*|*|*|*|*|*|*|*|
| NORMAL|***|***|***|***|***|***|***|* *|* *|* *| 40%|*|*|*|*|*|*|*|*|*|*|
|BELOW NORM| | | | | | | | * | * | * | 60%| | | | | | | | | | |
| VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | |
| BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | | | | | | | | | | | 60%| | | | | | | | | | |
| 40% | | | | | | |* *|* *|* *|* *| 40%| | | | | | |*|*|*|*|
| 20% |***|***|***|***|***|***|***|***|***|***| 20%|*|*|*|*|*|*|*|*|*|*|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |T|F|S|S|M|T|W|T|F|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
MIDDLE LATITUDES
__________________________________________________ ___________________
| SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT |
| QUALITY |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |S|M|T|W|T|F|S|S|M|T|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*|
|ABOVE NORM| | | | | | | | | | | 20%|*|*|*|*|*|*|*|*|*|*|
| NORMAL|***|***|***|***|***|***|***|***|***|***| 40%|*|*|*|*|*|*|*|*|*|*|
|BELOW NORM| | | | | | | | | | | 60%| | | | | | | | | | |
| VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | |
| BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | | | | | | | | | | | 60%| | | | | | | | | | |
| 40% | | | | * | * | * | * | * | * | * | 40%| | | | | | | | | | |
| 20% | **| **| **| **|***|***|***|***|***|***| 20%| | | | |*|*|*|*|*|*|
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |T|F|S|S|M|T|W|T|F|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
LOW LATITUDES
__________________________________________________ ___________________
| SIGNAL | Given in 8 hour local time intervals | | SID ENHANCEMENT |
| QUALITY |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |S|M|T|W|T|F|S|S|M|T|
|__________|___|___|___|___|___|___|___|___|___|___| |-|-|-|-|-|-|-|-|-|-|
| VERY GOOD| | | | | | | | | | | 0%|*|*|*|*|*|*|*|*|*|*|
|ABOVE NORM| | | | | | | | | | | 20%|*|*|*|*|*|*|*|*|*|*|
| NORMAL|***|***|***|***|***|***|***|***|***|***| 40%|*|*|*|*|*|*|*|*|*|*|
|BELOW NORM| | | | | | | | | | | 60%| | | | | | | | | | |
| VERY POOR| | | | | | | | | | | 80%| | | | | | | | | | |
| BLACKOUT| | | | | | | | | | |100%| | | | | | | | | | |
|==========|===|===|===|===|===|===|===|===|===|===| |-------------------|
| 100% | | | | | | | | | | |100%| | | | | | | | | | |
| 80% | | | | | | | | | | | 80%| | | | | | | | | | |
| 60% | | | | | | | | | | | 60%| | | | | | | | | | |
| 40% | | | | * | * | * | * | * | * | * | 40%| | | | | | | | | | |
| 20% | **| **| **| **| **| **| **| **| **| **| 20%| | | | | | | | | | |
| 0% |***|***|***|***|***|***|***|***|***|***| 0%|*|*|*|*|*|*|*|*|*|*|
|----------+---|---|---|---|---|---|---|---|---|---| |-|-|-|-|-|-|-|-|-|-|
|CHANCE OF |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat| |T|F|S|S|M|T|W|T|F|S|
| VHF DX | Given in 8 hour local time intervals | |AURORAL BACKSCATTER|
|__________|_______________________________________| |___________________|
NOTES:
These VHF DX prediction charts are defined for the 50 MHz to 150 MHz
bands. They are based primarily on phenomena which can affect VHF DX
propagation globally. They should be used only as a guide to potential
DX conditions on VHF bands. Latitudinal boundaries are the same as those for
the HF predictions charts. For more information, request the document
"Understanding Solar Terrestrial Reports" from: "oler@hg.uleth.ca".
AURORAL ACTIVITY PREDICTIONS (11 APRIL - 20 APRIL)
High Latitude Locations
________________________________________________________
| EXTREMELY HIGH | | | | | | | | | | |
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | | | |
------- | MODERATE | | | * | * | * | * |***|***|***|***|
75% | LOW |***|***|***|***|***|***|***|***|***|***|
| NOT VISIBLE |***|***|***|***|***|***|***|***|***|***|
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| INTENSITY | Eve.Twilight/Midnight/Morn.Twilight |
--------------------------------------------------------
Middle Latitude Locations
________________________________________________________
| EXTREMELY HIGH | | | | | | | | | | |
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | | | |
------- | MODERATE | | | | | | | | | * | * |
75% | LOW | * | * | * | * | * | * |***|***|***|***|
| NOT VISIBLE |***|***|***|***|***|***|***|***|***|***|
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| INTENSITY | Eve.Twilight/Midnight/Morn.Twilight |
--------------------------------------------------------
Low Latitude Locations
________________________________________________________
| EXTREMELY HIGH | | | | | | | | | | |
CONFIDENCE | VERY HIGH | | | | | | | | | | |
LEVEL | HIGH | | | | | | | | | | |
------- | MODERATE | | | | | | | | | | |
90% | LOW | | | | | | | | | | |
| NOT VISIBLE |***|***|***|***|***|***|***|***|***|***|
|----------------|---|---|---|---|---|---|---|---|---|---|
| AURORAL |Thu|Fri|Sat|Sun|Mon|Tue|Wed|Thu|Fri|Sat|
| INTENSITY | Eve.Twilight/Midnight/Morn.Twilight |
--------------------------------------------------------
NOTE:
For more information regarding these charts, send a request for the
document, "Understanding Solar Terrestrial Reports" to: oler@hg.uleth.ca.
** End of Report **
------------------------------
Date: 10 Apr 91 19:34:09 GMT
From: agate!bionet!uwm.edu!zaphod.mps.ohio-state.edu!wuarchive!emory!wa4mei!ke4zv!gary@ucbvax.berkeley.edu
To: info-hams@ucsd.edu
References <41087@genrad.UUCP>, <2696@ke4zv.UUCP>, <1991Apr7.022929.10814@maverick.ksu.ksu.edu>e
Reply-To : gary@ke4zv.UUCP (Gary Coffman)
Subject : Re: HF rig names?
In article <1991Apr7.022929.10814@maverick.ksu.ksu.edu> mac@cis.ksu.edu (Myron A. Calhoun) writes:
>In <2696@ke4zv.UUCP> gary@ke4zv.UUCP (Gary Coffman) writes:
>>.... A few top of the line transceivers offer dual receive so even
>>this excuse to have separates is coming to an end.
>
>Hmmnn. I wasn't aware that the old (1975?) TenTec Triton IV was
>ever considered "top of the line" even back then. But with an
>(optional) external VFO it has dual-frequency receive.
Let me rephrase that. *Simultaneous* dual receive capability. The ability
to listen to two frequencies at once in a transceiver negates the need
for a separate receiver.
Gary KE4ZV
------------------------------
End of Info-Hams Digest
******************************