UO-11

23:59 UTC  Thanks Tetsu san (JA0CAW) for the audio file

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C6667EF67000168000E69000F
UOSAT-2           0903306024206

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024211

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024216

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024220

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024225

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024230

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C6667EF67000168000E69000F
UOSAT-2           0903306024235

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C6667EF67000168000E69000F
UOSAT-2           0903306024240

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024245

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024250

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024254

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024259

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024304

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C6667EF67000168000E69000F
UOSAT-2           0903306024309

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C6667EF67000168000E69000F
UOSAT-2           0903306024314

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           0903306024319

000000010001020002030003040004050005060006070007080008090009
100001110000120003130002140005150004160007170006180009190008
20000221000322000023000124000625000726000427000528000A29000B
30000331000232000133000034000735000636000537000438000B39000A
40000441000542000643000744000045000146000247000348000C49000D
50000551000452000753000654000155000056000357000258000D59000C
60800E615FC1620105633305644402651E0C66600667000168000E69000F
UOSAT-2           09033060.....

2 thoughts on “UO-11”

  1. The lights are on, but no-one is home.
    ######################################

    Hi Mike, and readers,

    I dowloaded and analysed data for many years from U0SAT2.
    The frame shown is interesting, but useless.

    UOSAT-2 0903306024319

    000000010001020002030003040004050005060006070007080008090009
    100001110000120003130002140005150004160007170006180009190008
    20000221000322000023000124000625000726000427000528000A29000B
    30000331000232000133000034000735000636000537000438000B39000A
    40000441000542000643000744000045000146000247000348000C49000D
    50000551000452000753000654000155000056000357000258000D59000C
    60800E615FC1620105633305644402651E0C66600667000168000E69000F

    The UoSAT2 telemetry system is hard-wired in CMOS and uses a single A/D converter which is sequentially switched between channels using hardwired logic.
    This is *very* similar to the system used on AO7 which does the same thing in the absence of useful data… it still polls the telemetry channels creating a data ‘frame’ filled with… err.. umm… nothing!

    Uosat2 is no different.

    The lights are on, but no-one is home. That is to say that the counter-multiplexer circuits are still running, but the A/D circuitry is delivering nothing to them. Why? Well the A/D requires a reference voltage, to which sampled data are compared. In the absence of the reference, the process doesn’t work. The A/D in both AO7 and UoSAT2 seems to require a higher bus voltage than the CMOS counters, shift registers etc do. Actually, CMOS is quite forgiving of voltage variations.

    This of also of course means that the battery has failed o/c, as ni-CD’s *hardly ever* do! They normally fail short. Lucky us!

    So in many ways, UoSAT2 has suffered the same fate as Oscar7. There *may* be differences in the subtle ways that they failed, but essentially BOTH have batteries that are NOT short circuited… but they may be dragging the bus voltages dowm… acting as a resistor, rather than a storage battery.

    It also should be mentioned that both craft are very old and cosmic radiation will have darkened the cover-slide glasses protecting the solar cells, so there is likely in both birds to be a very limited supply of power.

    One thing is clear….. first generation CMOS has proved to be exceptionally resilient in a high radiation environment. Other technoligies have not fared so well. We should learn from the experience with these old ladies of space.
    There are practical lessons there to be learned and acted upon.

    I’m not a gambler, but I *would* bet that without the batteries on board, both UoSAT2 and Oscar7 could still work well… in sunlight. UoSAT7 has indeed worked fairly well in the past, when in full sunlight.

    This of course, raises a new raft of qusations re batteries on spacecraft. perhaps we’d fare better without them. Seriously!

    I had hoped for great things from DELFI C3’s linear transponder batteryless system…. but alas it was never to be. What a wated opportunity IMHO.

    Have a good Christmas folks.

    73 de Al.
    GM1SXX

  2. Thanks Al
    Hope all on orbit sat follow the trend of (Green sat). Using sun, no toxic batteries.dream about Green ao-40 re-born . just a dream!!

    73,Nader

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