Or on the GPS/GNSS signals... I was verifying Lady Heather's support for the old SV6/Palisade/Acutime receivers and came across a mention of the "GPS System Message" command. It is requested by TSIP packet 0x28 and returns packet 0x48. Newer Trimble receivers (like the Resolution-T don't seem to support the 0x28/0x48 messages. It is only mentioned in the SV6 docs. The system message is a 22 character ASCII string embedded in the GPS navigation messages. If you dig into the GPS ICD docs it says it is used like a "bulletin board" for GPS users and can be a plaintext or encrypted message. They currently seem to be encrypted... perhaps a way to distribute P-code keys? I wonder if any of the newer GNSS sats have some hidden goodies in the signals? When sent to the SV6, you get a single response. When sent to a Thunderbolt, you get 31 messages (mostly all the same). I think the different messages are due to delays in the ground control system updating the satellites or the receiver not tracking particular satellites between updates. Here a couple of responses from a Thunderbolt: # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:X4W-BZXE3/HPU77G49PU1V # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:5FT16X78CN53GVWVF1/8BW # GPS system message:5FT16X78CN53GVWVF1/8BW # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:5FT16X78CN53GVWVF1/8BW # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO # GPS system message:E:S4.A2'3'A65/C5M8 UQO ---------------- > I wonder how many secret services are parasites on the commercial TV transponders

Hi Mark: I don't think the SV Messages are related to Over The Air Rekeying (OTAR) since they don't have enough characters.  My guess is that they are a modern form of the Emergency Action Message (EAM). Here's a screen shot of a DAGR GPS receiver showing the first couple of messages as of 2 pm pacific time 3/31/2018: http://www.prc68.com/I/DAGR.shtml#SV_Messages https://en.wikipedia.org/wiki/Over_the_Air_Rekeying https://en.wikipedia.org/wiki/Emergency_Action_Message -- Have Fun, Brooke Clarke http://www.PRC68.com http://www.end2partygovernment.com/2012Issues.html -------- Original Message -------- > Or on the GPS/GNSS signals... I was verifying Lady Heather's support for the old SV6/Palisade/Acutime receivers and came across a mention of the "GPS System Message" command. It is requested by TSIP packet 0x28 and returns packet 0x48. Newer Trimble receivers (like the Resolution-T don't seem to support the 0x28/0x48 messages. It is only mentioned in the SV6 docs. The system message is a 22 character ASCII string embedded in the GPS navigation messages. > > If you dig into the GPS ICD docs it says it is used like a "bulletin board" for GPS users and can be a plaintext or encrypted message. They currently seem to be encrypted... perhaps a way to distribute P-code keys? > > I wonder if any of the newer GNSS sats have some hidden goodies in the signals? > > When sent to the SV6, you get a single response. When sent to a Thunderbolt, you get 31 messages (mostly all the same). I think the different messages are due to delays in the ground control system updating the satellites or the receiver not tracking particular satellites between updates. > > Here a couple of responses from a Thunderbolt: > > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q > # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:Z9Mx69BOC1 Lx+:LR3X2 Q > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > # GPS system message:X4W-BZXE3/HPU77G49PU1V > > > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:5FT16X78CN53GVWVF1/8BW > # GPS system message:5FT16X78CN53GVWVF1/8BW > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:5FT16X78CN53GVWVF1/8BW > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > # GPS system message:E:S4.A2'3'A65/C5M8 UQO > > ---------------- > >> I wonder how many secret services are parasites on the commercial > TV transponders > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. >