Dear friends,
we submit below the final proposal for AMSAT Phase 3E to the Coordination Advisatory Panel. Several suggestions are implemented now. Major changes are in the 5.6 GHz, 24 GHz, and 47 GHz bands.
After careful discussion with Michael, DB6NT, who is our national Microwave Manager in DL, we adopted Graham s proposal to use frequencies in the 2 MHz wide narrow-band segment of the microwave bands. So satellite work and
terrestrial dx will be possible with the same equipment. Thus we expect sort of a synergetic effect , which will attract narrow-band dx enthusiasts to the amateur satellite service, and lead OSCAR amateurs also to terrestrial microwave dx. Additionally this concept could help to protect the important narrow-band segment against other services, and these satellite frequencies could be defended against such threads with the help of dx interested amateurs.
Graham: Could you please contact IARU Region 1 and ask them to agree with this frequency choice?
Hans: Do we have to submit the official coordination form sheet or is this mail sufficient in view of the fact, that this is an AMSAT satellite?
73 de Norbert, DF5DP
————————————————-
P3E frequency proposal (DL6DBN, 03-10-01) 4th draft
=========================================
First of all, we thank all of you who made their welcomed
comments about the 1st, 2nd and 3rd draft. We hope almost
every good advice became part of this 4th and final draft.
The P5 experimental transponder is still in its design
phase. So these frequencies have to be coordinated later.
Most designers of RF-module for P3E are in the state of
ordering flight crystals. So we appreciate an OK or
necessary changes until Mid October. Thank you!
29 MHz Uplink (A)
—————–
RUDAK: 29.500 +/- 5 kHz (multi-mode, low-speed)
PB: 29.325 +/- 25 kHz (linear)
145 MHz Downlink (V)
——————–
GB: 145.812 (PSK 400 b/s)
EB: 145.957 (PSK 400 b/s)
RUDAK: 145.837 (multi-mode, lo-speed)
PB: 145.845 to 145.945 (linear)
435 MHz Uplink (U)
——————
RUDAK: 436.200 to 436.350 (multi-mode)
PB: 436.050 to 436.150 (linear)
1260 MHz Uplink1 (L1)
———————
RUDAK: 1268.775 to 1268.925 (multi-mode)
PB: 1268.600 to 1268.750 (linear)
1260 MHz Uplink2 (L2 – GALILEO alternative)
——————————————-
RUDAK: 1260.275 to 1260.425 (multi-mode)
PB: 1260.100 to 1260.250 (linear)
2400 MHz Downlink (S)
———————
GB: 2400.250 (PSK 400 b/s)
EB: 2400.500 (PSK 400 b/s, hi-speed option)
RUDAK: 2400.600 to 2401.000 (multi-mode, lo/hi-speed)
PB: 2400.275 to 2400.425 (linear)
5650 MHz Uplink (C)
——————-
PB: 5668.600 MHz +/- 25 kHz (linear)
24 GHz Downlink (K)
——————-
PB: 24048,300 MHz +/- 25 kHz (linear)
Beacon: 24048,350 MHz
47 GHz Downlink (R)
——————-
PB: 47088,300 MHz +/- 25 kHz (linear)
Beacon: 47088,350 MHz
2450 MHz Uplink (S) – 10450 MHz Downlink (X)
——————————————–
TBD
This is the P5A experimental coherent transponder.
It will need a fix frequency relation for coherent
mode and appr. 2 MHz bandwidth for ranging mode.
It will be configurable as linear transponder too
with approximately 50 kHz passband width.
Notes
—–
GB = General Beacon
EB = Engineering Beacon
PB = Passband
RUDAK = Digital Multi-Mode Payload
General note: Except for 145 MHz (see below)
frequencies were chosen not to conflict with
any other amateur radio satellite. Several
frequencies reuse those of decayed AO-13 or
unusable on AO-40. The microwave frequencies
above 5.6 GHz were pre-coordinated among
memmbers of the mm-community.
145 MHz note: Frequencies were chosen to
minimize conflicts with popular downlinks
at 145.800 (ISS) and 145.825 MHz and
uplinks at 145.990 (ISS) and 145.975 MHz
(UO-14). Nevertheless the passband covers
almost all PACSAT-uplinks as 145 MHz is
the most popular amateur satellite band.
Experience with AO-13 and PACSATs in the
early 90s showed that the low power signals
of the transponder passband downlink didn t
harm the LEO packet uplinks.
Klla: AMSAT-NA