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GET /hyperkitty/api/list/[email protected]/email/D4SM2XGTGCW4OCK6UZF4NNFMAUBPNOXG/?format=api
{ "url": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/D4SM2XGTGCW4OCK6UZF4NNFMAUBPNOXG/?format=api", "mailinglist": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/?format=api", "message_id": "[email protected]", "message_id_hash": "D4SM2XGTGCW4OCK6UZF4NNFMAUBPNOXG", "thread": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/thread/C6NTLBSRSXWKZXVXMFDNFJIN5I4NWZ6S/?format=api", "sender": { "address": "dquagliana (a) aol.com", "mailman_id": "75c9beaffd1d4a0cb28236652097bbb0", "emails": "https://mailman.amsat.org/hyperkitty/api/sender/75c9beaffd1d4a0cb28236652097bbb0/emails/?format=api" }, "sender_name": "Douglas Quagliana", "subject": "[amsat-bb] Re: ref my copy of ao-51", "date": "2008-08-10T23:31:51Z", "parent": "https://mailman.amsat.org/hyperkitty/api/list/[email protected]/email/C6NTLBSRSXWKZXVXMFDNFJIN5I4NWZ6S/?format=api", "children": [], "votes": { "likes": 0, "dislikes": 0, "status": "neutral" }, "content": "Hi Jeffrey,\n\nyou wrote:\n > hi folks, can anyone exlpain a little of this copy to us?\n\nSince I haven't seen anyone else reply (yet) I'll\ntry to answer this. Remember: you asked. :-)\n\nThese are all packets sent from the onboard computer\naboard AO-51. The PECHO-11 callsign is AO-51's\nbroadcast callsign and the packets from this callsign\n(and PECHO-12) will contain data in the Pacsat Protocol\nformat. This is the protocol that the onboard BBS\nuses to send and receive data in a way that time shares\nthe satellite with all of the groundstations. Your\ncomputer needs to be running a program like WiSP in\norder for your computer to talk to the satellite using\nthe Pacsat protocol. (I say \"like WiSP\" because there\nare other program besides just WiSP that also speak\nthis protocol, but WiSP is probably the most popular.)\n\nThe TLMS and TLMI packets are telemetry packets that\ncontain information about the health and current status\nof the spacecraft. The TLMI packet is sent as binary\ndata and you need a telemetry program like TlmEcho or\nSabins to decode the telemetry into meaningful values.\n(Full disclosure: I wrote the Sabins telemetry program.\nIt's free if you want a copy and I don't make any money\nfrom it.) If you received the 9600 baud signal with\na program like Willow, or if you saved the received\npackets to a KISS file then Sabins can go back and show\nyou the decoded telemetry and what it means. Since the\ndata in the TLMI packets is binary you have to have saved\nit as a KISS file, not as ASCII text, or you will lose\nthe binary data. If you use an Apple, then you need\nMacEchoTelem.\n\n > PECHO-11*>PBLIST <UI>: PB: Empty.\n >\nThe queue is empty. Probably nobody is using the\nBBS right now.\n\n > PACBLS-8*>PACBLS-8 <UI>: PACBLS S Meter = 0\n >\nThe S Meter reads zero right now (or at the moment\nwhen the computer looked at the S meter).\n\n > PACB-1*>TLMI-1 <UI>: [and some binary data]\n >\nA telemetry packet. The binary data you put in your\nemail didn't make it through the mailing list, but\nthis packet will tell you all about the voltages,\ncurrents, and temperatures on each part of the\nspacecraft. Everything from the solar panels to the\nbattery control regulators to the radios to the\ntorque rod... and so on. It will also tell you\nwhat is turned on and what is turned off. You need\ntlmEcho or Sabins or MacEchoTelem to decode this\ninformation so that you can see what this packet is\nsaying about the spacecraft. (Ok, you *could* do all\nof the polynomial calculations by hand, but it would\nbe very tedious.)\n\n > PACB-1*>TLMS-1 <UI>: C0:0D C1:44 C2:76 C3:2F C4:04 C5:01\n >\nA simpler telemetry packet. The \"C\" numbers are channel\nnumbers and the hexadecimal number after the colon is a\nbitmask that tells you about things like the BCR DAC chip,\nthe transmitters, the torque rod commands, receiver\nchannels selected, CTCSS tones, some stuff about S band,\nand so on. For example, C2:76 tells you that\n- The RS-232 power monitor is OFF.\n- CTCSS TXA and TXB do not have valid tone(s).\n- Receivers 1 2 and 3 have their receive frequencies\n set to the main frequency.\n\n > PECHO-12*>BBSTAT <UI>: Open ABCD:\n >\nAgain, more of \"nobody is using the BBS right now.\"\n\n > PECHO-11*>STATUS <UI>: B: 120900539\n >\nThis is a byte counter. Your software can save this number\nand then when you get the next STATUS packet the software\ncan look at the new number and get a count of the bytes\n(of certain types) that were sent by the spacecraft between\nthe two packets. You can compare that count to the number\n(of those types) of bytes you received and see just how\nmuch of the satellite's transmitted data you missed or\nreceived in error. This gives you an idea of how good your\nreception of the satellite's signal was between those two\npackets. This number (apparently) does not increase for the\nbytes in telemetry packets.\n\n >PACB-1*>LSTAT <UI>: I P:0x13A8 o:0 l:27208 f:27245, d:1 st:6 e:8b\n >\nSome lower level satellite status. For example, \"d:1\"\nindicates that the AX.25 digipeater is enabled. If you\nwere to send a packet \"VIA\" AO-51, and if AO-51 heard it\nwithout any errors, then AO-51 would retransmit your\npacket on the downlink for everyone else to receive it.\n\nFor more information on the PASCAT protocols, see\n\nhttp://www.amsat.org/amsat/sats/nk6k/msatpro.html\n\n(Note: there are some addendums to those documents.)\n\nFor more information specifically on AO-51, I recommend\n\"AO-51 Development, Operation and Specifications\" by Gould\nSmith. You should be able to get a copy if you call\nMartha at AMSAT or via the AMSAT store at\n\nhttp://www.amsat-na.com/store/item.php?id=100047\n\nAnd if you're really really interested in this sort of\nstuff, you can get a copy of the \"Digital Disk\" which\nincludes WiSP. (Full disclosure again: I wrote a few\nthings on the Digital Disk, but again, I don't make\nmoney from it.)\n\nGood luck, and see you on the birds.\n\n73,\nDouglas KA2UPW/5\n\n", "attachments": [] }