SB ALL @ AMSAT $ALINS.009 Updated AO-13 Telemetry Part 1 HR AMSAT LAUNCH INFORMATION NETWORK SERVICE BULLETIN .009 FROM WA2LQQ WARWICK, NY JUNE 18, 1988 TO ALL RADIO AMATEURS BT Phase 3C Telemetry Channel Allocations and Equations Updated As of 15Jun88 Per DJ4ZC Per W4PUJ Per WA2LQQ Part 1 of 2 Parts Telemetry Function Equation Units Channel ----------------------------------------------------------------------------- 00 Solar panel out and BCR input voltage (n-10)*167 mV 01 70 cm xmtr average power output (261-n)^2/724 W 02 70 cm rcvr temperature (n-120)/1.71 C 03 (Reserved) - 04 BCR output and main battery voltage (n-10)*79.5 mV 05 (Special Purpose) xxxxxxxxxxxx - 06 2 m xmtr power amplifier temperature (n-120)/1.71 C 07 +14 volt rail current to xponder (n-15)*24.27 mA 08 +10 volt regulator voltage (n-10)*53.2 mV 09 Helium tank high pressure (n-14)*6.56 Bar 0A IHU temperature (n-120)/1.71 C 0B +14 volt rail current to magnetorquers - and antenna relay (n-15)*4.854 mA 0C BCR oscillator #1 status 0=Off; N>10=On - 0D He tank low side pressure control voltage (n-15)*.117 Bar(abs) 0E BCR temperature (n-120)/1.71 C 0F +10 volt regulator current (n-15)*4.854 mA 10 BCR oscillator #2 status 0=Off; N>10=On - 11 N2O2 tank pressure (n-106)*0.733 Bar 12 SEU temperature (n-120)/1.71 C 13 Battery charge current (n-15)*12.135 mA 14 Top (+Z) photocell sun sensor (n-10)*8.53 mV 15 Motor valve status 102=Closed, 118=Open - 16 Auxillary battery #1 temperature (n-120)/1.71 C 17 Active BCR ouput current (n-15)*24.27 mA 18 Bottom (-Z) photocell sensor (n-10)*8.53 mA 19 XXXXXXXXXXX 1A Auxillary battery #2 temperature (n-120)/1.71 C 1B Active BCR input current on 28 volt line (n-15)*12.135 mA 1C Spin rate {if n<139, r=(131-n)*0.85+20 rpm or {if n>=139 r=479/(n-109)-2 rpm 1D L rcvr AGC (n-75)^2/-1125 dB 1E Main battery temperature (n-120)/1.71 C 1F Solar panel #6 current (n-15)*4.854 mA 20 2m xmtr average power output (287-n)^2/1796 W 21 He tank temperature (n-120)/1.71 C 22 Solar panel #1 temperature (n-120)/1.71 C 23 Solar panel #5 current (n-15)*4.854 mA 24 70 cm rcvr AGC (n-71)^2/2465 dB 25 70 cm xmtr PA temperature (n-120)/1.71 C 26 Solar panel #3 temperature (n-120)/1.71 C 27 Solar panel #4 current (n-15)*4.854 mA 28 Special purpose xxxxxxxxxxxx - 29 24 cm rcvr temperature (n-120)/1.71 C /EX SB ALL @ AMSAT $ALINS.010 Updated AO-13 Telemetry Part 2 HR AMSAT LAUNCH INFORMATION NETWORK SERVICE BULLETIN .010 FROM WA2LQQ WARWICK, NY JUNE 18, 1988 TO ALL RADIO AMATEURS BT Phase 3C Telemetry Channel Allocations and Equations Updated As of 15Jun88 Per DJ4ZC Per W4PUJ Per WA2LQQ Part 2 of 2 Parts Telemetry Function Equation Units Channel ----------------------------------------------------------------------------- 2A Solar panel #5 temperature (n-120)/1.71 C 2B Solar panel #3 current (n-15)*4.854 mA 2C +14 volt regulator voltage (n-10)*66.8 mV 2D RUDAK temperature (n-120)/1.71 C 2E Top (+Z) skin temperature of arm #1 (n-120)/1.71 C 2F Solar panel #2 current (n-15)*4.854 mA 30 Mode B transponder +9 V supply voltage (n-10)*54 mV 31 Wall temperature in arm #2 (n-120)/1.71 C 32 Bottom (-Z) skin temperature of arm #1 (n-120)/1.71 C 33 Solar panel #1 current (n-15)*4.854 mA 34 Special purpose xxxxxxxxxxxx - 35 Wall temperature in arm #1 (n-120)/1.71 C 36 N2O4 tank temperature (n-120)/1.71 C 37 Reserved - 38 Auxillary battery voltage (n-10)*78.5 mV 39 Mode S transponder temperature (n-120)/1.71 C 3A +Z platform temperature (SERI experiment) (n-120)/1.71 C 3B Reserved - 3C Mode L transponder +9 V supply voltage (n-10)*45.4 mV 3D AZ-50 tank temperature (n-120)/1.71 C 3E Nutation damper temperature (n-120)/1.71 C 3F Reserved ------------------------------------------------------------------------------ NOTES: The equation values are preliminary estimates ONLY. IHU = Integrated Housekeeping Unit; the computer BCR = Battery Charge Regulator He = Helium SEU = Sensor Electronics Unit N2O4 is nitrogen tetroxide; the propellant oxidizer UDMH is unsymmetrical di-methyl hydrazine; the propellant fuel Notes regarding channels 14 and 18: These two sensors detect sunlight on the top (+Z) surface and the bottom (-Z) surface of the spacecraft. The provide only a rough indication of sun position and are used to resolve ambiguity in the readings from the sun sensors. When in full sunlight, a count of 65 will result. A count of about 10 is background noise only. The sun is declared present when the count exceeds 20. The main spacecraft solar cell arrays receive maximum illumination when the sun is perpendicular to (normal to) the spin axis (Z-axis). When this condition exists, both the +Z and -Z detectors will yield background readings (10) only. A count of 20 or greater on either indicates misalignment. The higher the count, the greater the misalignment of the spacecraft with respect to the sun angle (beta angle). /EX