Feb 19, 2021, Nighttime Operation Report

2021_02_19_3rd.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)","RSSI data downlink(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 : CW:S9[dB], Bus Voltage: 4.050 [V], Angular velocity: 73.98 [deg./s]
4th : CW:S9[dB], Bus Voltage: 4.075 [V], Angular velocity: 73.61 [deg./s]

3rd:"RSSI data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)"
Number of received packets
HORIZONTALLY POLARIZED WAVE : 0
VERTICAL POLARIZED WAVE : 0
radio interference : strong

○Next Operation Schedule
1st : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5819392 SC_S:32, SSC:35, SP:52, ESC:35, EP:1023)”.
2nd : "CW custom operation(437.075MHz)", ”Video data downlink(QPSK transmitter, π/4 shift QPSK38k4, 435.900MHz)(Size:5819392 SC_S:32, SSC:35, SP:52, ESC:35, EP:1023)”.

2021/2/20      AOS     |       PE      |      LOS
------------------------------------------------------------------------------------------
Time(JST)    7:20:11 | 7:24:34 | 7:28:57
Azimuth      40.55  |   92.09   |  143.50
Elevation      0.01   |    9.52   |   -0.01
------------------------------------------------------------------------------------------
Time(JST)    8:52:47 | 8:58:16 | 9:03:48
Azimuth      2.43  |   285.55   |  208.18
Elevation      0.01   |    39.24   |   -0.02
------------------------------------------------------------------------------------------

○Latest TLE
1 43937U 19003F 21049.39831982 .00001515 00000-0 62591-4 0 9997
2 43937 97.1942 97.2778 0025211 76.0012 284.4027 15.25202707116115

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