University of Southern California
NASA-Catalog: 38760
Downlink / Bake
437.600 MHz 1k2 AFSK AX.25, FM
Call
KE6YFA-1
Status
INACTIVE
Orbital Parameter
NORAD 38760 Inclination 64.666 RA of A. Node 266.436 Eccentricity 0.0147374 Argument of Perigee 56.877 Revs per day 14.89369403 Period 1h 36m 41s (96.68 min) Semi-major axis 6 978 km Perigee x Apogee 497 x 703 km BStar (drag term) 0.000700800 1/ER Mean anomaly 304.657
Mission
The primary payload speaks to a mission with global reach: tracking cargo containers over the open ocean with a 1-watt WiFi-like transceiver. A current tracking system for cargo containers, designed by our primary payload provider iControl Inc., is capable of identifying the container within a mile from shore, but loses all contact for the majority of the open-water journey. For both government and non-government entities, the ability to track containers in transit is highly valued. This mission uses a custom-built deployable mesh antenna, and stretches the attitude control and power generation capabilities of the Colony I bus to its limits.
The secondary payload is an experimental, next-generation, radiation-hardened flight processor. The result of many government-funded research initiatives, this ITAR-controlled processor is at risk of staying in the “unholy valley” between research and development. On Aeneas, the processor will be space-qualified by performing self-diagnostic checks and reporting the results back to the ground. We hope that by raising the technology readiness level (TRL) we can provide a path to service for this high-performance chip.
AENEAS audio signalLinks und weitere Informationen
Telemetrie
PACKET EXAMPLE
The packet below, stored in the file sample.dat, is used for illustration. The ASCII characters represent hexadecimal digits. How the bit patterns encoded by these digits is interpreted depends on their position in the packet.
4341455255531D0040020001010B06000732FF070000001000F07500003E330041C0A50BC1CFD3 Breakdown of the packet by byte: Bytes Label Offset ----- ----- ------ 43 41 45 52 55 53 Packet Header 0 - 5 1D 00 Packet Length 6 - 7 40 Packet Type 8 - 8 02 00 Unused Bytes 9 - 10 01 01 0B 06 00 07 32 Date/Time Encoding 11 - 17 FF 07 Reboot Counter 19 - 20 00 00 Reboot Reason Code 21 - 22 00 10 Flash Status Flags 23 - 24 00 F0 75 00 Telemetry Pointer 25 - 28 00 3E 33 00 Payload Write Pointer 29 - 32 41 Radio Status 33 - 33 C0 A5 0B C1 Miscellaneous Write Pointer 34 - 37 CF D3 Checksum 38 - 39
The first six bytes represent a marker token that signals that a packet follows. For AENEAS, the word “CAERUS” is used. (CAERUS is the name of a previous USC spacecraft, the “older sibling” of AENEAS.) The marker will always be 434145525553, CAERUS in ASCII. The final two bytes of the packet are a checksum. The decoder calculates the checksum and compares it to this value to validate the data.
KE6YFA-1>CQ,TELEM:4341455255531D0040020001010B06000900FF070000001000F075000031360041001745C1F952 AENEAS Beacon Data Decoder Opening file at 30092012.txt AENEAS Beacon TLM Packet found: ---------TELEMETRY-BEGIN---------- Total length: 29 Type:64 Unused: 0x02 0x00 Time: 1/1/11-6-0:9:0 Reboots: 2047 Last Reboot Cause: 0 Flash Status: 0 Bit 0 = 0 : Device is ready. Bit 1 = 0 : Device is NOT write-enabled. Bit3&4= 1 : All sectors software-protected. Bit 4 = 0 : WP is asserted. Bit 5 = 0 : Last op successful. Bit 7 = 0 : Sector Protection Registers unlocked. Payload Write Pointer: 3551488 Telemetry Pointer: 7729152 Radio Status: 65 No detailed Radio info yet Misc Write Pointer: -1052436736 ---------TELEMETRY-END---------- Done: End of stream reached.
Please send RAW temetry information recieved to the following e-mail with “Pass” in the title of the e-mail: aeneas@astronautics.usc.edu
QSL Card
