diff --git a/Documentation/Kirk's Notes.txt b/Documentation/Kirk's Notes.txt index 5795e46..9304752 100644 --- a/Documentation/Kirk's Notes.txt +++ b/Documentation/Kirk's Notes.txt @@ -30,6 +30,7 @@ Satellite telecom Frequency assignments // Westar 1: Uplink at 5925-6425 MHz, downlink at 3700-4200 MHz // Comstar 1: Uplink at 5925-6425 MHz, downlink at 3700-4200 MHz, two polarized beams // Marisat: Uplink at 300-312 & 1638-1642 & 6420-6424 MHz, downlink at 248-260 & 1537-1541 & 4195-4199 MHz [12] +// CS-2: Uplink at 6???-6??? & 27625-28945 MHz, downlink at 4???-4??? & 17825-19145 MHz [35] // XM Radio: Uplink at 7050-7072 MHz, downlink at 2320-2332 MHz [20] Satellite TT&C frequency assignments @@ -76,6 +77,7 @@ However, it gives a good idea of what the state of the art was for ground statio // 1976 - Comstar 1: FM? [4, p.20-16] // 1976 - Marisat: FM or CPSK [12, p.257] // 1983 - Soviet general: Deployment of MDVU-40 equipment [30, p.3-50], a.k.a TDMA-40(?), implied to use QPSK encoding [5, p.IV-7] +// 1983 - CS-2 (Sakura): CS-2 offers QPSK and TDMA-65 in Ka-band [35] // 1985 - Intelsat V: Intelsat V supports TDMA-120, implied to use QPSK [5, p.IV-7] // 1986 - Intersputnik general: Intersputnik stations still use FM for TV, but digital TDMA-40 mode for voice is rolled out [5, p.A-3] // 1989 - Intelsat VI: TDMA-140 or TDMA-155 employed, using 8PSK [5, p.IV-7] diff --git a/Documentation/citations.txt b/Documentation/citations.txt index 129aa05..16c6ea0 100644 --- a/Documentation/citations.txt +++ b/Documentation/citations.txt @@ -64,4 +64,8 @@ List of sources and citations used for Skopos, in no particular order [32] Satellite Communications, 2018 https://itso.int/wp-content/uploads/2018/04/Presentation-by-Intelsat.pdf [33] Syncom Engineering report Volume II, 1967 - https://ntrs.nasa.gov/api/citations/19670015715/downloads/19670015715.pdf \ No newline at end of file + https://ntrs.nasa.gov/api/citations/19670015715/downloads/19670015715.pdf +[34] Overview of Ka-band Satellite System Developments, 2012 + https://www.itu.int/dms_pub/itu-r/md/12/iturka.band/c/R12-ITURKA.BAND-C-0008!!PDF-E.pdf +[35] Pilot Program and Operational Users of CS-2, 1987 + https://doi.org/10.1016/0094-5765(87)90112-3 \ No newline at end of file diff --git a/GameData/Skopos/telecom.cfg b/GameData/Skopos/telecom.cfg index 753618f..7e7a8bb 100644 --- a/GameData/Skopos/telecom.cfg +++ b/GameData/Skopos/telecom.cfg @@ -36,6 +36,19 @@ //make it 1024 so rate halvings divide evenly ChannelWidth = 1.024e9 } + + BandInfo { + name = Ka (Wideband) + TechLevel = 7 + // Put the allocation just below 18 GHz. + Frequency = 18.95e9 + // ITU allocates FSS downlink between 17.7 and 20.2 GHz, and uplink between 27.5 and 30 GHz [34, p.4] + //(actually 17.7-21.2 and 27.5-31, but upper 1 GHz is government/military reserved in most regions) + + //Standard ITU Ka-band fixed satellite service allocations. 2500 MHz uplink, 2500 MHz downlink. [34, p.4] + //make it 4096 so rate halvings divide evenly + ChannelWidth = 4.096e9 + } } @RealAntennasCommNetParams:AFTER[RealAntennas] {