AO-16 update

Hi All,

Here is a quick AO-16 update. On Sunday I turned AO-16 long enough to get some telemetry packets. The satellite would remain on for less than one minute after being commanded on. A quick test of the “bent pipe” voice mode repeater was successful. . The “hardware watchdog timer problem” is still evident; as expected, spacecraft temperatures are insufficient to keep the transmitter ON (needs to be above 15 deg C).

Orbit projections suggest that satellite illumination conditions will not result in increased temperatures for nearly 10 years.
Command stations do periodically turn AO-16 “ON” to check on its condition and see if the hardware timer problem has “automagically” fixed itself (which in not anticipated, but who knows…).

AO-16 telemetry 3 Oct 2010 1838 utc

PACSAT MBL Telemetry Decoder Ver. 1.3     (c) Mike Rupprecht, DK3WN
===============================================================================
(average values)

+10V Battery Bus   : 0.00 V
Battery Charge Reg : 0.55 mA
Base Temp          : 9.07 °C
PSK RF Out         : 1.90 W
+5V RX Bus         : 4.87 V
+8.5V RX Bus       : 8.49 V
+10V RX Bus        : 11.24 V

Here is another teaser 🙂 Several months ago I commanded the AO-16 S-band transmitter ON; it too remains functional (albeit weak), and was received by me, Drew KO4MA, and Alan WA4SCA.

73,

Mark L. Hammond [N8MH]

AO-16 update

Here is a quick AO-16 update. On Sunday I turned AO-16 long enough to get some telemetry packets. The satellite would remain on for less than one minute after being commanded on. A quick test of the “bent pipe” voice mode repeater was successful. . The “hardware watchdog timer problem” is still evident; as expected, spacecraft temperatures are insufficient to keep the transmitter ON (needs to be above 15 deg C).

Orbit projections suggest that satellite illumination conditions will not result in increased temperatures for nearly 10 years. Command stations do periodically turn AO-16 “ON” to check on its condition and see if the hardware timer problem has “automagically” fixed itself (which in not anticipated, but who knows…).

AO-16 telemetry
3 Oct 2010 1838 utc

PACSAT MBL Telemetry Decoder Ver. 1.3 (c) Mike Rupprecht, DK3WN
======================================================
(average values)
+10V Battery Bus : 0.00 V
Battery Charge Reg : 0.55 mA
Base Temp : 9.07 °C
PSK RF Out : 1.90 W
+5V RX Bus : 4.87 V
+8.5V RX Bus : 8.49 V
+10V RX Bus : 11.24 V

Here is another teaser 🙂 Several months ago I commanded the AO-16 S-band transmitter ON; it too remains functional (albeit weak), and was received by me, Drew KO4MA, and Alan WA4SCA.

73,

Mark L. Hammond [N8MH]

Happy 20th Birthday AO-16!


Telemetry collected from AO-16, celebrating its 20 years since being launched.

PACSAT MBL Telemetry Decoder Ver. 1.3     (c) Mike Rupprecht, DK3WN
===============================================================================
(average values)

+10V Battery Bus   : 0.00 V
Battery Charge Reg : 0.71 mA
Base Temp          : 13.43 °C
PSK RF Out         : 2.34 W
+5V RX Bus         : 4.84 V
+8.5V RX Bus       : 8.41 V
+10V RX Bus        : 10.99 V

AO-16 MBL mode

Mark, N8MH: Hi Mike, I got a report from Australia on 0551 and 0729 utc (Colin, VK5HI) that AO-16 had gone silent again. 🙁
Around 11:42 utc I turned it back ON again. It was very low elevation, so I could not get any telemetry after turning it ON. Lately, it has not stayed ON very long after a restart. If you are around your shack and able, some telemetry from AO-16 would be most appreciated 🙂
73, Mark

1300 UTC AO-16 low elev pass (12°) AO-16 wieder im MBL Mode, 2 Telemetriebursts empfangen

Battery Charge Reg : 0.73 mA
Base Temp : 27.70 °C
PSK RF Out : 1.86 W
+5V RX Bus : 4.90 V
+8.5V RX Bus : 8.49 V
+10V RX Bus : 10.95 V

1438 UTC AO-16 immer noch im MBL Mode, aber nur 1 Telemetrieburst empfangen

Battery Charge Reg : 0.67 mA
Base Temp : 14.52 °C
PSK RF Out : 1.87 W
+5V RX Bus : 4.89 V
+8.5V RX Bus : 8.54 V
+10V RX Bus : 10.99 V

1625 UTC AO-16 immer noch im MBL Mode, gute Telemetrieausbeute!

Battery Charge Reg : 0.73 mA
Base Temp : 13.31 °C
PSK RF Out : 1.87 W
+5V RX Bus : 4.91 V
+8.5V RX Bus : 8.49 V
+10V RX Bus : 10.99 V