Jan 13, 2020, Nighttime Operation Report

2021_01_13_4th.JPG
Hello, everyone. We are NEXUS development project team in Nihon University. Your receiving reports are used for confirmation of NEXUS state. Thank you for your cooperation. We will report the result of nighttime operation today.

CW custom mode
NEXUS are orbiting at CW custom mode now. CW format is following.
JS1YAVNEXUS04 (Sattime : 8words) (SW info : 2words) (Reset info : 10words) (Bat Vol : 4words) (Gyro x : 4words) (Gyro y : 4words) (Gyro z : 4words)
Total : 49words (characters)

○Operation Result
We performed nighttime operations twice.
"CW custom operation(437.075MHz)",”QPSK Test Operation(QPSK transmitter, π/4 shift QPSK38k4, ,435.900MHz)”.

・CW Operation
For CW telemetry format, please have a look at the pdf below.
http://sat.aero.cst.nihon-u.ac.jp/nexus/download/NEXUS_CW_telemetry_format_e.pdf
3rd:No operation.
4th:CW:S9[dB], Bus Voltage: 4.123 [V], Angular velocity: 53.82 [deg./s].
5th:CW:S9[dB], Bus Voltage: 4.106 [V], Angular velocity: 54.20 [deg./s].

4th:"QPSK Test Operation(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)"
radio interference : weak

5th:"QPSK Test Operation(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)"
radio interference : weak

○Next Operation Schedule
1st : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:23, SP:256, ESC:23, EP:511)”.
2nd : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5987328 SC_S:22, SSC:23, SP:512, ESC:23, EP:767)”.
3rd : No operation.

2021/1/14      AOS     |       PE      |      LOS
------------------------------------------------------------------------------------------
Time(JST)    7:15:07 | 7:19:01 | 7:22:53
Azimuth      45.83  |   90.25   |  134.67
Elevation      0.00   |    6.62   |   -0.01
------------------------------------------------------------------------------------------
Time(JST)    8:47:17 | 8:52:53 | 8:58:24
Azimuth      5.68  |   284.10   |  202.46
Elevation      0.02   |    53.04   |   0.00
------------------------------------------------------------------------------------------
Time(JST)    10:23:51 | 10:25:30 | 10:27:09
Azimuth      316.73  |   299.48   |  282.05
Elevation      0.00   |    0.95   |   -0.01
------------------------------------------------------------------------------------------

○Latest TLE
1 43937U 19003F 21013.11593665 .00001630 00000-0 67494-4 0 9996
2 43937 97.1994 62.3900 0023032 199.2220 160.8152 15.25081212110587


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