Satellite QSO ( Some very short Audio Fragments concerning Firsts via Satellites )

SEVERAL AUDIO FRAGMENTS CONCERNING SATELLITE QSO

SHORT TEXT

DG0BBE
DL2DRD

PA5RWE
PE2JMR ORBIT 5675 MA PHASE 66 AF 100104 16:27 UTC

ON5NY
2E1EUB ORBIT 5573 MA PHASE 64 AF 030104 17:57 UTC

 

On this page you find : dg0bbe, dl2drd, pa5rwe, pe2jmr, on5ny. Also, heard via SO-50 satellite : 2e1eub with CQ. Some audio files will be exchanged ( from time to time ). Because of questions or requests.

Other very short qso ( see below ) :

f1oog
, g8ate, pe1nil, mm5iss, do1gut, rw3ww, oe3emc, oe3flu, ua9san, on5sa, on4bk, f6byj.

A first try ( 15 Aug 2004 ) via Echo in the trial period ( see below ) : AO-51 ( shortened audio file ).

More English & Dutch Text : see below.

TEXT
TEXT

SHORT TEXT

MORE AUDIO FRAGMENTS

Other short qso :
f1oog
, g8ate, pe1nil, mm5iss, do1gut, rw3ww, oe3emc, oe3flu, ua9san, on5sa, on4bk, f6byj.

Also you find here my first try ( 15 Aug 2004 ) via the famous Echo Satellite in the trial period : AO-51 ( shortened audio file ).

More Text ( also Dutch ) : see below.

F1OOG
G8ATE
PE1NIL
MM5ISS
DO1GUT
RW3WW
OE3EMC
OE3FLU
UA9SAN
SO-50 ORBIT 5689 MA PHASE 62 AF 110104 15:16 UTC
AO-51 ORBIT 660 MA PHASE 22 AF 150804 10:27 UTC
SO-50 ORBIT 8875 MA PHASE 114 AF 150804 08:46 UTC

PLACE LINK TXT
PLACE LINK TXT

SOME RECEIVED QSL CARDS CONCERNING THE MENTIONED AUDIO FILES

Erdmannsdorf ( Sachsen )  via UO-14 Click for more InfoAudio ( QSO 09:57 UTC 180101 AO-27 )Passendale (B) via AO-27 Click for more Info

Audio ( QSO 09:17 UTC 090501 UO-14 )
Audio ( QSO 09:50 UTC 121001 UO-14 )Audio ( QSO 09:57 UTC 110501 UO-14 )

Baden Bei Wien via UO-14 Click for more Info
Audio ( QSO 15:16 UTC 110104 SO-50 )Viesville (B) via AO-51 Click for more Info

 

SOME EXPLANATIONS ABOUT THE WORKING CONDITIONS


Many websites include audio files. Here are only mentioned ( because of the same genre and context ) : http://www.qsl.net/hb9oab/sat and http://space.cweb.nl/goto.html?u=pd0rkc.ontwikkel.nl Remark : hb9oab was my first worked Satellite Station, the operator did it very well hi.

However, equipment which was used during the very short contacts ( concerning this page ) :

up=> Kenwood TM 231E low power and Alinco DJ-F1

down=> Alinco DR 510E, no preamps

All these trx were old FM mobile or handheld equipment. Remark : the taperecorder had been connected ( directly ) to the Alinco tranceiver DR 510E ( concerning UO-14 and AO-27 in mode J ). Therefore my voice is exclusively on tape ( and in the audio file ) if I came over the satellite ( downlink recorded ). That means : if the satellite receiver could see my signal hi ( I did not record the uplink ).

Apologies because of the audio quality. In those times I had to use an inducer ( to pick up the audio from the headphones ). Further, the taperecorder was very noisy. Because of the compression, most ( mono ) audio files ( sample rate = 6000, resolution = 8 bits ) delivered a bad signal noise ratio. Remark : because UO-14 and AO-27 were leo fm bent pipe satellites and I worked with fixed antennae, a 'qso' was often very short.

Used antennae under roof :

vhf=> monopoles or small linear/circular * beams

uhf=> linear/circular * beams

* selectable

These antennae were self made and they had been constructed from old materials or older antennae, sometimes they had been modified ( or the design ). Often I used an antenna input power ( because of the experiments ) of 10 milliwatt or 500 milliwatt ( tx output DJ-F1 100 milliwatt or TM 231E 5 watt into a -10 deciBell transmission line circuit ). During the contacts the antennae were pointed very exact to the satellite. QSL Cards : see satellite qsl

Thanks to everyone, who came back after my CQ, who returned for me !

Remark : if one has a fixed beam in the right direction, one can use the AOS and LOS situations. These deliver possibilities to work satellites with ultra low power. During these periods azimuth and doppler values only change a little bit ( if it concerns a high pass ! )

See ( ! ) : http://www.qsl.net/vk3jed/doppler.html *

* compare the 11 degree and the 89 degree pass !

In 4 minutes only 1 kHz frequency shift will exist in the uhf band ( during a high pass AOS or LOS ), in these cases there is no need to readjust the ( fm ) trx. Another important advantage : because of the low elevation satellite 'dx' is possible now. Concerning these special situations : see the chart ( below ) which had been produced by qth.exe
For qth.exe zipped ( two versions ) you can click the pictureqth.zip ( two versions )

                      
CHART COPY ( NOTEPAD ) QTH.EXE

+--------------------------------------------+
 UO-14          PA3GJE         UA9SAN      
--------------------------------------------
 Locator     :     JO20UU         LO91LI    
 Longitude   :    542'30" E    5857'30" E 
 Latitude    :   5051'15" N    5121'15" N 
 Bearing     :   6753'30"     24928'48"   
 Distance    :    3633.1 km                 
+--------------------------------------------+
+--------------------------------------------+
 UO-14/AO-27    PA3GJE         JW7FJF      
--------------------------------------------
 Locator     :     JO20UU         JQ78TF    
 Longitude   :    542'30" E    1537'30" E 
 Latitude    :   5051'15" N    7813'45" N 
 Bearing     :    420'48"     19333'55"   
 Distance    :    3068.9 km                 
+--------------------------------------------+
+--------------------------------------------+
 AO-27          PA3GJE         CU3AN       
--------------------------------------------
 Locator     :     JO20UU         HM68JQ    
 Longitude   :    542'30" E    2712'30" W 
 Latitude    :   5051'15" N    3841'15" N 
 Bearing     :  25500'38"      5122'29"   
 Distance    :    2894.8 km                 
+--------------------------------------------+

JUST IN BETWEEN, ATV AIR 3 TEST FROM PIPER WARRIOR PH-SDB VIA BEEK ASL 1997, VIDEO FROM PA3AOK ( WHO RECEIVED THE TV SIGNALS FROM THE AIRPLANE ), MINIMIZED, WMV FILE

JUST IN BETWEEN, A NICE VIDEO CLIP FROM RVAC, PA-28 PIPER WARRIOR II IN THE AIR, MINIMIZED, WMV FILE


LAST .....


I constructed the antennae in such a way that the azimuth direction functioned critically. But not the elevation direction ( 0 - 20 degree, +/- 3.0 deciBell beamwidth ). Between 0 and 20 degree the antenna continued to 'see' the satellite. Within 3 deciBell. Because of perpendicular increase ( or decrease ) during AOS ( or LOS ). Of course I had the possibility to choose a desired polarization hi. So, now I could work with fixed frequencies and antenna directions. An example :

frequencies : AOS tx - 5 kHz rx + 10 kHz, LOS tx + 5 kHz rx - 10 kHz

and azimuth : AOS 020 degree, LOS 205 degree
.

Because of the accurate antenna pointings I was able to work the satelllite with very low power with a fixed beam.

Suggestion, tip : About Echo, 12 Suggestions for Success Working AMSAT-OSCAR 51 ( Echo ) on a Handheld Transceiver, see

http://www.amsat.org/amsat-new/echo/EchoHT.php

Dutch text : Speciaal voor de belangstellenden en aankomende zend en luister
amateurs meende ik dat het wel interessant zou zijn om enkele audio files
te plaatsen, zo hoor je eens de 'sound' van zo'n satelliet. Overigens ook voor de gevorderden kan het leuk zijn om aan te horen. De in deze pagina geplaatste audio fragmenten zijn een verwijzing naar een bepaalde periode in het radio amateur satelliet verkeer. Satellieten als UO-14, AO-27 en SO-35 zullen de meesten niet snel vergeten.De regels gelden echter ook voor de meer recente satellieten.

Uitgaande van het feit dat er een beam gebruikt werd was de leo bent pipe satelliet moeilijk te werken als er te weinig operating practice bestond ! De snelheid van overkomst is zeer groot ( de omloopsnelheid bedraagt ongeveer 27000 kilometer per uur ) als de hoogte circa 800 kilometer bedraagt ( typisch voor een LEO ) en er was maar een kanaal ter beschikking ( typisch bent pipe ). Als je dan ook nog zonder speciale voorzieningen werkte ( doppler shift compensatie en software met interface voor antenne besturing ) werd het extra problematisch hi. Vaak is een ( zeer kort ) qso zelfs niet mogelijk, de bent pipe satelliet staat niet echt goed bekend, in verband met de gemakkelijke bereikbaarheid wordt er ook wel vaak gestoord. Toch kon ook hier soms een leuk contact bestaan, en / of werden er effectief ( dus ook zeer kort ! ) gegevens uitgewisseld, daarvan moeten de betreffende audio files getuigen.

Tot slot : in verband met de hoogte ( circa 800 kilometer ) van de betreffende satellieten ( UO-14 en AO-27 ) was de maximaal overbrugbare afstand ( van locator naar locator ) tussen twee stations ongeveer 6000 kilometer. Voor de SO-50 ( hoogte circa 700 kilometer ) is het ongeveer 5500 kilometer.

Hierboven vind je enkele tabellen met afstanden. Indien dit je
interesseert kun je het zeer compacte dos programma ( qth.exe, gezipt ) dat deze tabellen op basis van de betreffende qth locators maakt, downloaden.
Voor qth.exe zipped ( twee versies ) kunt u op het plaatje klikken qth.zip ( twee versies )


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