Patent ID: 6052588
Filing Date: 2000-04-18
Classification: H04B

Abstract:
A method for storing telemetry in a satellite control system, comprising the steps of:(a) checking frame synchronization and data error of telemetry frames received from a satellite, tagging a time when the telemetry frames were received and transmitting the received telemetry frames to a telemetry archiving block, using a telemetry frame receiving block;(b) storing in real time the telemetry frames received at the telemetry archiving block into a short-term storage area using a short-term storage process;(c) retrieving telemetry frames, which were maintained for a predetermined period of time, from the telemetry frames stored in the short-term storage area using a mid-term storage process;(d) copying the retrieved telemetry frames into a mid-term storage area using the mid-term storage process and calling a telemetry data processing block;(e) extracting parameters used for trend analysis of data from the copied telemetry frames and converting the extracted parameters into values in engineering units using the telemetry data processing block;(f) checking the extracted parameters;(g) obtaining a data value of a lastly stored parameter and an extracted data value to be presently processed in accordance with a result of step (f), and setting a reference value of variation for filtering;(h) extracting analog and status parameters by comparing the data value of the lastly stored parameter, the extracted data value to be presently processed, and the referenced value of variation for filtering, and transmitting the extracted parameters using the mid-term storage process in the telemetry archiving block;(i) forming records of a frame from the received extracted parameters, storing the records of a frame in the mid-term storage area, and modifying data values in a parameter table, using the mid-term storage process;(j) deleting data and telemetry frames stored in the short-term storage area and modifying a catalog in the mid-term storage area, using the mid-term storage process used to modify the data values in the parameter table;(k) retrieving telemetry frames, which were maintained for a predetermined period of time, from the telemetry frames stored in the mid-term storage area, using a long-term storage process;(l) copying the retrieved telemetry frames into a long-term storage area;(m) retrieving analog parameters in engineering units from the copied telemetry frames and calculating an average value, a maximum value, a minimum value and variance of parameters;(n) storing the calculated average value, maximum value, minimum value and variance of parameters into the long-term storage area; and(o) deleting the telemetry frames and data copied into the mid-term storage area and modifying the catalogues in the mid-term storage area and the long-term storage area using the long-term storage process used to store the calculated values into the long-term storage area.