SB NEWS @ AMSAT $SPC0216 * SpaceNews 16-Feb-98 * BID: $SPC0216 ========= SpaceNews ========= MONDAY FEBRUARY 16, 1998 SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is published every week and is made available for non-commercial use. * 70-cm SPECTRUM LOSS * ======================= In late January, the Telecommunications Authority in the country of Guatemala auctioned off four frequencies between 430 MHz and 435 MHz for commercial use, despite their use by amateur radio operators in that part of the world. Amateurs in the region have been trying to convince authorities not to auction spectrum that is shared by amateurs to commercial users for over a year, but as is often the case, the money that could be gained through such a frequency auction spoke much louder than reasonable arguments by hams against the selling of spectrum rights to the highest bidder. Mexico also recently lost UHF amateur band spectrum to commercial interests, and this appears to be a disturbing trend. Although the 430 MHz to 435 MHz spectrum loss in Guatemala does not directly effect OSCAR satellite communications, a precedence has now been set, and just as arguments against such an auction by amateur radio operators largely fell on deaf ears, there is no guarantee that frequencies within the 435 MHz to 438 MHz UHF amateur satellite sub-band will not be auctioned off to the highest bidder in the future. The implications of frequency auction involving spectrum used by OSCAR satellites are staggering. While commercial interests buying rights to UHF spectrum are primarily concerned with short-range communication services, it is well known that even low-power transmissions can be relayed half a world away via a transponder carried on-board a communication satellite in earth orbit. Clearly, something needs to be done to prevent future spectrum grabs that affect worldwide amateur satellite communications if OSCAR satellites are to continue to utilize spectrum that is not exclusively allocated to the Amateur Radio Service. The situation is not all doom and gloom, however. Frequency allocations used in amateur radio satellite communications did fare well at the World Radio Conference held in Geneva, Switzerland late last year. WRC 97 delegates did agree to upgrade the Earth Exploration Satellite Service from secondary to primary at 1215 MHz to 1300 MHz, which should have only minimal impact on amateur use of 1240 MHz to 1300 MHz. The presence of these satellites reduces the possibility that other, less-compatible services might later be introduced into this band. * WT0N SK * =========== It is with great sadness that the passing of B.J. Arts, WT0N, is reported. BJ, who was 37 years old and had suffered for a number of years from acute diabetes, reportedly succumbed to flu soon after being taken to the hospital on the evening of 08-Feb-98. BJ was very active on the satellites and VHF bands, and acted as editor of the AMSAT-NA's AMSAT News Service bulletins for the past several years. AMSAT News Service bulletins are available on amateur packet radio and via the Internet. BJ sent a QSL card to SpaceNews on 17-Mar-91. On his card, BJ wrote: John: Just wanted to let you know I like SpaceNews. Great Info! 73 es God Bless BJ BJ was a very special person who gave of himself to help others, and will be sorely missed by all. * OSCAR-11 NEWS * ================= During the period 14-Jan-98 to 16-Feb-98, good signals have been received from UoSAT-OSCAR-11's 145.826 MHz VHF beacon. Three reports of the S-band beacon have been received. Masa, JA0BES, reports signals of one S-unit above the noise using a 34 element beam and Maki-Denk1 converter. Joe, KC6SZY, uses a 76-cm dish with 2.5 turn helical feed into an SSB Electronics converter. He reports S3 signals, compared to DOVE's S6. Joe has very kindly sent Clive Wallis an audio file of the signals which he has added to his OSCAR-11 Web site (details below). Ken, G8VR, also reports hearing OSCAR-11 and DOVE on S-Band. UoSAT-OSCAR-11's telemetry has been nominal. After a slight fall, the internal temperatures have stabilized at around at 5.4C and 3.0C for battery and telemetry electronics respectively. The change in temperature is due to variations solar eclipse times. In recent years, the satellite has been subjected to long periods of continuous sunlight which has produced fairly high internal temperatures (eg. battery 22C, and beacons around 34C). Eclipses are expected throughout 1998 which should result in lower temperatures with fairly small variations. A single WOD survey has been transmitted during the reporting period. Channels 10, 20, 30, 40 (+Y, -X, +X array currents, array voltage), dated 06-Jan-98. This shows the effect of solar eclipses on array currents and voltage. OSCAR-11 users are welcome to visit Clive Wallis' OSCAR-11 Web site. Clive has recently added some audio files, including the Mode-S recording made by KC6SZY, which plays for 20 seconds. The other audio files are examples of each type of data transmitted by OSCAR-11, and each one plays for about ten seconds. All the audio files are compressed (ZIP), so that they can be played off-line. They should help listeners identify the various types of data transmitted by OSCAR-11, and give an indication of the signal quality required for successful decoding. The web site also contains some software for capturing data, and decoding ASCII telemetry and WOD. There is an archive of raw data (mainly WOD) for analysis, which is continually being expanded as new data is captured. The URL is: http://www.users.zetnet.co.uk/clivew/ UoSAT-OSCAR-11's operating schedule remains unchanged: ASCII status (210 seconds) ASCII bulletin (60 seconds) BINARY SEU (30 seconds) ASCII TLM (90 seconds) ASCII WOD (120 seconds) ASCII bulletin (60 seconds) BINARY ENG (30 seconds) There are also additional status blocks after each bulletin is transmitted, and between ASCII TLM and WOD. The Mode-S beacon is ON transmitting an unmodulated carrier, but telemetry indicates that it has partially failed and delivering half power. This beacon is a useful test source for those testing Mode-S converters, prior to the launch of P3-D. It is considerably weaker than DOVE, which should be used for initial testing. Any reports of reception of UO-11's 2401 MHz beacon would be most welcome, and should be directed to Clive Wallis at: g3cwv@amsat.org. The 435.025 MHz beacon is normally OFF. However, it can sometimes be heard when the satellite is being commanded by ground control (ie. within range of Guildford, UK). When the 435 MHz beacon is transmitting, the 145 MHz beacon is normally OFF. The data transmitted is mainly binary. [Info via Clive Wallis, G3CWV, g3cwv@amsat.org] * FEEDBACK/INPUT WELCOMED * =========================== Comments and input for SpaceNews should be directed to the editor (John, KD2BD) via any of the paths listed below: WWW : http://www.njin.net/~magliaco/ PACKET : KD2BD @ KS4HR.NJ.USA.NA INTERNET : kd2bd@amsat.org, magliaco@email.njin.net SATELLITE : AMSAT-OSCAR-16, LUSAT-OSCAR-19, KITSAT-OSCAR-25 <<=- SpaceNews: The first amateur newsletter read in space! -=>> <<=- Serving the planet for 10 years -=>> /EX