CN103163782B - Spacecraft delay telemetering downloading strategy computing method - Google Patents
Spacecraft delay telemetering downloading strategy computing method Download PDFInfo
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- CN103163782B CN103163782B CN201310064373.0A CN201310064373A CN103163782B CN 103163782 B CN103163782 B CN 103163782B CN 201310064373 A CN201310064373 A CN 201310064373A CN 103163782 B CN103163782 B CN 103163782B
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Abstract
The invention relates to a spacecraft delay telemetering downloading strategy computing method and belongs to the field of delay telemetering information processing. The method comprises the following steps of obtaining periodic tracking time information of a spacecraft, computing invisible time and downloading actual visible segmental arc time of delay telemetering, and delay telemetering of source packets, and setting initial downloading extracting ratio n of the segmental arc to be 1; and judging whether the longest time needed by the segmental arc delay telemetering data to complete downloading is longer than actual usable downloading time or not, according to the tracking time, arranging the downloading extraction ratio n of each segmental arc, and ending. Under the condition that normal telemetering condition is not interfered, the method can ensure continuity of invisible segmental arc delay telemetering.
Description
Technical field
Pass policy calculation method under the present invention relates to a kind of spacecraft delayed telemetry, belong to delayed telemetry field of information processing.
Background technology
The spacecraft of native to this world synchronous orbit is period in orbit, there is the invisible segmental arc of observing and controlling, and on star, number pipe computing machine can complete process and the storage of delayed telemetry in section at this moment; By to source bag (PK) scheduling in AOS remote measurement system, just can process normal remote measurement, delayed telemetry data, biography can be removed with current normal remote measurement one by delayed telemetry in TT & c arc.Quantitative computing method are not had due to current, the method that usual employing is estimated carries out delayed telemetry data down transmission, the data estimated are excessive with passing quantity at present, affect normal telemetry function, the deficiency estimated can not ensure the continuity of whole invisible segmental arc telemetry, TTC channel resource is limited, when not disturbing normal remote measurement, also the continuity of invisible segmental arc delayed telemetry is ensured, just need by calculating each source bag down-transmitting data amount, extraction ratio is set, under formulating rational spacecraft delayed telemetry, passes strategy.
Summary of the invention
The object of the invention is, in order to solve above-mentioned problems of the prior art, to pass policy calculation method under proposing a kind of spacecraft delayed telemetry, the method, when not disturbing normal remote measurement, also ensures the continuity of invisible segmental arc delayed telemetry.
The object of the invention is to be achieved through the following technical solutions.
Pass policy calculation method under a kind of spacecraft delayed telemetry of the present invention, steps of the method are:
1) by the TT&C plan of ground observing and controlling net, to obtain with certain survey station be benchmark, and spacecraft periodically follows the tracks of time information;
2) the invisible time of preserving delayed telemetry and the visible arc-segment time passing down reality thereof is calculated in each segmental arc, wherein, " the invisible time of record ", " follow the tracks of and terminate " mistiming in moment by this segmental arc " follow the tracks of start " moment and last segmental arc and obtain; " this segmental arc SEE time ", the mistiming of " following the tracks of and terminating " moment and " follow the tracks of and start " moment by this segmental arc obtains;
3) delayed telemetry of each source bag in each segmental arc is calculated, each source bag data are added the total amount of data obtaining this segmental arc and need to pass down, calculate maximum, the minimum total amount of data of storage that this segmental arc needs to pass down respectively, storage maximum amount of data is, has maximum secondary data to change according to source Bao Jun each in whole invisible segmental arc.When storing maximum, the data that whole delayed telemetry total amount of data is active bag and; Storage minimum data amount is, according in whole invisible segmental arc change just store source Bao Jun do not have data variation to calculate, when storing minimum, whole delayed telemetry total amount of data be part source bag data with;
4) normal, delayed telemetry data have same physical channel, with passing at present, calculate delayed telemetry data down transmission speed;
5) arranging this segmental arc, initially to pass extraction ratio n be down 1;
6) according to delayed telemetry storage time under each tracking segmental arc in cycle of calculating, situation maximum according to data volume, minimum respectively, extract ratio n according to the biography down arranged, calculate this segmental arc delayed telemetry data down transmission complete required the longest, the shortest under pass the time;
7) judge that this segmental arc delayed telemetry data down transmission completes required maximum duration and whether is greater than the actual available biography time down, be, when having the source of priority requirement bag to remain unchanged, the n value increase by 1 of other sources bag, forward 6 to), recalculate and meet this segmental arc delayed telemetry data down transmission and complete required maximum duration, until the maximum duration that this segmental arc needs is not more than the actual available biography time down, can determine this period n value (source bag biography down extract ratio n can according to 2, 3, 4 ... the order of 20 recalculates successively, until the longest biography time down required for this segmental arc is less than or equal to actual pot life), that this segmental arc extracts ratio just can be set to the numerical value before calculating, and prepares next segmental arc and calculates, turn next step,
8) judging whether the calculating of not arriving last segmental arc, is forward 5 to); No, turn next step;
9) judged whether that certain segmental arc n value is greater than 10, and the n value of a segmental arc is less than 5 thereafter, be that two segmental arcs are merged into one, wherein, new " the invisible time of record " adds next segmental arc " the invisible time of record " for previous segmental arc All Time; New " this segmental arc SEE time " is still next segmental arc " this segmental arc SEE time ", turns 3) recalculate; No, proceed to next step;
10) according to the tracking moment, the biography down arranging every segmental arc extracts ratio n, terminates.
Above-mentioned steps 7) the source bag of described priority requirement, selected principle requires relevant with required biography down, passes, ensure the data volume of acquisition abundance under the high priority data paid close attention to.Such as, in 10 kinds of down-transmitting data types, the first is chosen to be, and override passes down, can be set to 1, and can not adjust passing under it extraction ratio n, and other kind data are that extraction ratio n can be 1 or more, are adjustable.
Beneficial effect
Method of the present invention, when not disturbing normal remote measurement, also ensures the continuity of invisible segmental arc delayed telemetry.
Accompanying drawing explanation
Fig. 1 is process flow diagram schematic diagram of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1
1) by the TT&C plan of ground observing and controlling net, to obtain with Jiamusi survey station be benchmark, and spacecraft periodically follows the tracks of segmental arc, and it is on May 15th, 2012 that last tracking segmental arc follows the tracks of finish time, 3:56:06; It is on May 15th, 2012 that this segmental arc follows the tracks of start time, 22:56:1; It is on May 16th, 2012 that this segmental arc follows the tracks of finish time, 5:57:39;
2) the invisible time of preserving delayed telemetry and the visible arc-segment time passing down reality thereof is calculated in this segmental arc, wherein, " the invisible time of record ", " follow the tracks of and terminate " mistiming in moment by this segmental arc " follow the tracks of start " moment and last segmental arc and obtain, Tx equals 19:00:11; " this segmental arc SEE time ", the mistiming of " following the tracks of and terminating " moment and " follow the tracks of and start " moment by this segmental arc obtains, and T1 equals 7:01:22;
3) be 19:00:11 according to Tx, calculate the delayed telemetry of each source bag in this segmental arc, and the total amount of data passed down, the maximum total amount of data of storage that calculating this segmental arc respectively needs to pass down is 849532 bytes;
4) normal, delayed telemetry data have same physical channel, and with passing at present, calculating delayed telemetry data down transmission speed is 112 byte per seconds;
5) arranging this segmental arc, initially to pass extraction ratio n be down 1;
6) according to delayed telemetry storage time under each tracking segmental arc in cycle of calculating, respectively according to the situation that data volume is maximum, extract ratio n according to the biography down arranged, calculate this segmental arc delayed telemetry data down transmission and complete that required the longest to pass time Tmax be down 12:12 hour;
7) due to Tmax > T1, when having the source of priority requirement bag to remain unchanged, just need the n value increasing other sources bag, arranging down and passing extraction ratio is 2: 1, forwarding step 3 to) the longest T2 recalculated required for this section of delayed telemetry is 6: 27, now T2 < T1, passes extraction ratio and can be set to 2: 1 under this section of delayed telemetry.
8) judge that the 11st segmental arc n value is greater than 10, and the n value of the 12nd segmental arc is less than 5 thereafter, and two segmental arcs are merged into one, it is on May 18th, 2012 that the 10th tracking segmental arc follows the tracks of finish time, 18:48:16; It is on May 19th, 2012 that 12nd segmental arc follows the tracks of start time, 14:30:11; It is on May 19th, 2012 that 12nd segmental arc follows the tracks of finish time, 21:49:59; Calculate these two segmental arcs to merge into " the invisible time of record " Tx in a segmental arc and equal 19:41:55; " this segmental arc SEE time " T1 equals 7:19:29;
9) 3 are turned) recalculate, obtain passing ratio n under these two segmental arcs merge into a segmental arc and be set to 2.
Claims (1)
1. pass a policy calculation method under spacecraft delayed telemetry, it is characterized in that steps of the method are:
1) by the TT&C plan of ground observing and controlling net, to obtain with certain survey station be benchmark, and spacecraft periodically follows the tracks of time information;
2) the invisible time of preserving delayed telemetry and the visible arc-segment time passing down reality thereof is calculated in each segmental arc, wherein, " the invisible time of record ", " follow the tracks of and terminate " mistiming in moment by this segmental arc " follow the tracks of start " moment and last segmental arc and obtain; " this segmental arc SEE time ", the mistiming of " following the tracks of and terminating " moment and " follow the tracks of and start " moment by this segmental arc obtains;
3) delayed telemetry of each source bag in each segmental arc is calculated, each source bag data are added the total amount of data obtaining this segmental arc and need to pass down, calculate storage maximum amount of data, storage minimum data amount that this segmental arc needs to pass down respectively, store maximum amount of data and calculate for there being according to source Bao Jun each in whole invisible segmental arc maximum secondary data to change; When storing maximum, the data that whole delayed telemetry total amount of data is active bag and; Store minimum data amount be according in whole invisible segmental arc change just store source Bao Jun do not have data variation to calculate, when storing minimum, whole delayed telemetry total amount of data be part source bag data with;
4) normal, delayed telemetry data have same physical channel, with passing at present, calculate delayed telemetry data down transmission speed;
5) arranging this segmental arc, initially to pass extraction ratio n be down 1;
6) according to delayed telemetry storage time under each tracking segmental arc in cycle of calculating, situation maximum according to data volume, minimum respectively, extract ratio n according to the biography down arranged, calculate this segmental arc delayed telemetry data down transmission complete required the longest, the shortest under pass the time;
7) judge that this segmental arc delayed telemetry data down transmission completes required maximum duration and whether is greater than the actual available biography time down, if, when having the source of priority requirement bag to remain unchanged, the n value increase by 1 of other sources bag, forward 6 to), recalculate and meet this segmental arc delayed telemetry data down transmission and complete required maximum duration, until the maximum duration that this segmental arc needs is not more than the actual available biography time down, the n value of this period can be determined, the biography down of source bag extracts ratio n according to 2, 3, 4 ... the order of 20 recalculates successively, until the longest biography time down required for this segmental arc is less than or equal to actual pot life, if not, this segmental arc extracts ratio just can be set to the numerical value before calculating, and prepares next segmental arc and calculates, turn next step,
8) judge whether the calculating of not arriving last segmental arc, if so, forward 5 to); If not, next step is turned;
9) judged whether that certain segmental arc n value is greater than 10, and the n value of a segmental arc is less than 5 thereafter, if so, two segmental arcs are merged into one, wherein, new " the invisible time of record " adds next segmental arc " the invisible time of record " for previous segmental arc All Time; New " this segmental arc SEE time " is still next segmental arc " this segmental arc SEE time ", turns 3) recalculate; If not, next step is proceeded to;
10) according to the tracking moment, the biography down arranging every segmental arc extracts ratio n, terminates.
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| CN107317769A (en) * | 2017-05-25 | 2017-11-03 | 北京空间飞行器总体设计部 | A kind of source bag dispatching method based on orderly priority query |
| CN113364511B (en) * | 2021-05-11 | 2023-04-07 | 上海卫星工程研究所 | Equilibrium transfer computing method and system based on CCSDS packet telemetry |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142189A (en) * | 2010-01-29 | 2011-08-03 | 上海卫星工程研究所 | Multi-channel telemetry transmission system |
| CN102521953A (en) * | 2011-11-15 | 2012-06-27 | 北京空间飞行器总体设计部 | Method for recording and downloading satellite measured and controlled telemetry parameters of invisible arc section |
| CN102681529A (en) * | 2012-04-23 | 2012-09-19 | 北京空间飞行器总体设计部 | Spacecraft autonomous delay telemetering method adapted to parameter characteristics |
| CN102932049A (en) * | 2012-10-24 | 2013-02-13 | 北京空间飞行器总体设计部 | Information transmission method of spacecraft |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102142189A (en) * | 2010-01-29 | 2011-08-03 | 上海卫星工程研究所 | Multi-channel telemetry transmission system |
| CN102521953A (en) * | 2011-11-15 | 2012-06-27 | 北京空间飞行器总体设计部 | Method for recording and downloading satellite measured and controlled telemetry parameters of invisible arc section |
| CN102681529A (en) * | 2012-04-23 | 2012-09-19 | 北京空间飞行器总体设计部 | Spacecraft autonomous delay telemetering method adapted to parameter characteristics |
| CN102932049A (en) * | 2012-10-24 | 2013-02-13 | 北京空间飞行器总体设计部 | Information transmission method of spacecraft |
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