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WIP: TSP (tlm space packet) Ver.2 の仕様を追加 #551
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Original file line number | Diff line number | Diff line change |
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@@ -71,11 +71,15 @@ Secondary Header は CCSDS Space Packet 定義において,ユーザー定義 | |
https://github.com/ut-issl/c2a-core/blob/e84ac663187adb7b9d51939f2228b9ecfa7ae292/TlmCmd/Ccsds/tlm_space_packet.h#L1-L51 | ||
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#### 各フィールドの説明 | ||
##### バージョン共通 | ||
- Secondary Header Version | ||
- `0x00`: バージョン不定 | ||
- `0x01`: Version 1 | ||
- `0x02`: Version 2 | ||
- Board Time | ||
- テレメトリが生成されたボード (OBC など) の時刻 (TI など) | ||
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##### Version 1 | ||
- Telemetry ID | ||
- テレメトリID | ||
- APID 内でユニークであればいい | ||
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@@ -105,6 +109,21 @@ https://github.com/ut-issl/c2a-core/blob/e84ac663187adb7b9d51939f2228b9ecfa7ae29 | |
- 例えば,Stored Telemetry 時には Data Recorder のどのパーティションに配送されるかを規定する | ||
- 将来拡張の可能性あり | ||
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##### Version 2 | ||
- On-Board Subnetwork Time (将来拡張) | ||
- 各ボードで作られたパケットの時刻を統一的に管理するために,オンボードサブネットワークで共通の時刻体系に基づくテレメトリ生成時刻 | ||
- `0xFFFFFFFF` の場合, パケット中継中に MOBC (地上局とつながる OBC) で,上書き設定される | ||
- On-Board Subnetwork Time を取得できない機器向け | ||
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#### バージョンの使い分け | ||
- Version 1 | ||
- 主に,Telemetry ID で区別される,パケットごとに構造化され定義されたテレメトリ (Character Tlm Packet) に使う | ||
- C2A では,Tlm Cmd DB の Tlm DB によってスキーマが定義され,時系列データベースなどに格納されることが一般的である | ||
- 基本的にはパケット分割されない(Sequence Flag が Standalone Packet である) | ||
- Version 2 | ||
- 主に,画像などのミッションデータやメモリダンプ (Binary Tlm Packet) を送信するときに使う | ||
- パケット分割は許容される | ||
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### Secondary Header (Command) | ||
Secondary Header は CCSDS Space Packet 定義において,ユーザー定義部分であるため,ここで定義する. | ||
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ここもきになる
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つまり,