Ground-based telemetering data frame counting overflow repair and error code detection repair method

Abstract

The invention discloses a ground-based telemetering data frame counting overflow repair and error code detection repair method. The method comprises the following steps: standardizing all telemetering station data files and outputting an intermediate file; selecting an intermediate file containing a take-off ignition moment, and traversing frame data in sequence to search and determine a reference frame; calculating a corresponding time scale conversion frame count according to the frame header time scale of the current frame; and judging whether the current frame recording frame count is consistent with the corresponding time scale conversion frame count, detecting whether error codes exist in the frame count, and calculating the frame count after overflow repair, namely absolute frame count. According to the characteristics of the telemetering data, the basic corresponding relation between the telemetering data frame header time mark and the frame count is utilized, the special conditions that the frame count returns to zero after taking off, the take-off frame is not consistent with the return-to-zero frame and the like are processed, and under the condition that the time mark error is not corrected, overflow repair and error code detection repair of the frame count are achieved.

Description

technical field

[0001] The invention belongs to the technical field of aerospace measurement and control methods, and in particular relates to a ground-based remote measurement data frame count overflow repair and error code detection and repair method. Background technique

[0002] After the space launch mission, multiple telemetry data files received by the ground-based telemetry station need to be spliced ​​and processed into full flight test data for post-event analysis. In the process of frame-based telemetry data fusion, both frame header time stamp and frame count can be used as key identifiers to identify telemetry frames. However, the time stamp of the telemetry data frame header is the local clock time when the ground telemetry equipment receives the telemetry signal. Due to the transmission delay of the telemetry signal, the clock difference between telemetry stations and other factors, the telemetry data frame header time of different stations corresponding to th...

Images