It seems that most reports of good Delfi reception relate to northbound passes. So far it appears that Delfi has not been heard in VK/ZL during a number of Southbound sunlit passes despite a number of stations listening and good reception of SEEDS and Cute1.7. Could this be a spacecraft orientation issue or has Delfi just a bit anti Southern hemisphere?
Alan
ZL2BX
Hello!
Perfect overhead pass #18 but no telemetry this time. Only some sort of carrier. Was the Delfi-C3 data stuck or something? I think there was some cyclical "data" modulation or interference on that carrier but all too weak to even identify.
-jari oh3uw
On Tuesday 29 April 2008 14:23, Alan Cresswell wrote:
It seems that most reports of good Delfi reception relate to northbound passes. So far it appears that Delfi has not been heard in VK/ZL during a number of Southbound sunlit passes despite a number of stations listening and good reception of SEEDS and Cute1.7. Could this be a spacecraft orientation issue or has Delfi just a bit anti Southern hemisphere?
snipped
It is possible that Alan is right? I have listened to two good sun-lit passes without hearing a thing from DelfiC3. I wonder what the telemetry is saying about orientation and power system performance? I like it when a new bird presents us with a puzzle :-)
73 de Geoff vk2tfg.
Geoff wrote:
On Tuesday 29 April 2008 14:23, Alan Cresswell wrote:
It seems that most reports of good Delfi reception relate to northbound passes. So far it appears that Delfi has not been heard in VK/ZL during a number of Southbound sunlit passes despite a number of stations listening and good reception of SEEDS and Cute1.7. Could this be a spacecraft orientation issue or has Delfi just a bit anti Southern hemisphere?
snipped
It is possible that Alan is right? I have listened to two good sun-lit passes without hearing a thing from DelfiC3. I wonder what the telemetry is saying about orientation and power system performance? I like it when a new bird presents us with a puzzle :-)
73 de Geoff vk2tfg.
Hi Geoff,
Next pass if you don't hear anything on 145.87 or `45.93 try to listen to delfi's emergency signal. Downlink signal in emergency mode are 2 tones, of 500Hz and 900Hz each, modulated DSB onto the (suppressed) carrier, use USB to receive this signal. These tones themselves are modulated with 100Bd FSK each with raw payload data. If you hear this signal, please record a wav file if possible.
Thanks,
Bram Delfi-C3 Mission Control
...DLFIC3>TLM>UI,?,F0 (1191 baud): .. ...S.S.S.S.S.S.S.Si#gCdZYoIz4".O."................y.w(s?gmT,<.T.¢®«?.i.'."1.²710.5@...........` DLFIC3>TLM>UI,?,F0 (1191 baud): ..!...S.S.S.S.S.S.S.S`"^A[ZQoC{/".O.'................f.)|@ok[A!~. ¯¬Y.?._.'.Z..................... DLFIC3>TLM>UI,?,F0 (1191 baud): .."...S.S.S.S.S.S.S.SU S?QYHp;{*".O.'.................?*.Awjb}F<$-.Y,®«Y...V.'.-..................... DLFIC3>TLM>UI,?,F0 (1191 baud): ..#.þfËÿ................ÿ?Ø×H..Jf..ðÀ.@.À.L...@..l ?g.°............................................,.@.".ª DLFIC3>TLM>UI,?,F0 (1191 baud): .. ...S.S.S.S.S.S.S.Si#gCdZYoIz4".O."................y.w(s?gmT,<.T.¢®«?.i.'."1.²710.5@...........` DLFIC3>TLM>UI,?,F0 (1191 baud): ..!...S.S.S.S.S.S.S.S`"^A[ZQoC{/".O.'................f.)|@ok[A!~. ¯¬Y.?._.'.Z..................... DLFIC3>TLM>UI,?,F0 (1191 baud): .."...S.S.S.S.S.S.S.SU S?QYHp;{*".O.'.................?*.Awjb}F<$-.Y,®«Y...V.'.-..................... DLFIC3>TLM>UI,?,F0 (1191 baud): ..#.þfËÿ................ÿ?Ø×H..Jf..ðÀ.@.À.L...@..l ?g.°............................................,.@.".ª
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participants (5)
-
Alan Cresswell -
Delfi-C3 Mission Control -
Geoff -
Jari Koivurinne -
Raul Romero CA3SOC