IRIG Time Code
| Bit | Weight | Meaning | Bit | Weight | Meaning | Bit | Weight | Meaning | Bit | Weight | Meaning | Bit | Weight | Meaning | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 00 | Pr | Frame marker | 20 | 1 | Hours (0–23) |
40 | 100 | Day of year (1–366) |
60 | 0 | Unused, available for Control Functions |
80 | 1 | Straight Binary Seconds (0–86399) |
||||
| 01 | 1 | Seconds (00–59) |
21 | 2 | 41 | 200 | 61 | 0 | 81 | 2 | ||||||||
| 02 | 2 | 22 | 4 | 42 | 0 | Unused | 62 | 0 | 82 | 4 | ||||||||
| 03 | 4 | 23 | 8 | 43 | 0 | 63 | 0 | 83 | 8 | |||||||||
| 04 | 8 | 24 | 0 | 44 | 0 | 64 | 0 | 84 | 16 | |||||||||
| 05 | 0 | 25 | 10 | 45 | 0.1 | Tenths of seconds (0.0–0.9) |
65 | 0 | 85 | 32 | ||||||||
| 06 | 10 | 26 | 20 | 46 | 0.2 | 66 | 0 | 86 | 64 | |||||||||
| 07 | 20 | 27 | 0 | Unused | 47 | 0.4 | 67 | 0 | 87 | 128 | ||||||||
| 08 | 40 | 28 | 0 | 48 | 0.8 | 68 | 0 | 88 | 256 | |||||||||
| 09 | P1 | Position identifier | 29 | P3 | Position identifier | 49 | P5 | Position identifier | 69 | P7 | Position identifier | 89 | P9 | |||||
| 10 | 1 | Minutes (00–59) |
30 | 1 | Day of year (1–366) |
50 | 1 | Year (00–99) |
70 | 0 | Unused, available for Control Functions |
90 | 512 | |||||
| 11 | 2 | 31 | 2 | 51 | 2 | 71 | 0 | 91 | 1024 | |||||||||
| 12 | 4 | 32 | 4 | 52 | 4 | 72 | 0 | 92 | 2048 | |||||||||
| 13 | 8 | 33 | 8 | 53 | 8 | 73 | 0 | 93 | 4096 | |||||||||
| 14 | 0 | 34 | 0 | 54 | 0 | 74 | 0 | 94 | 8192 | |||||||||
| 15 | 10 | 35 | 10 | 55 | 10 | 75 | 0 | 95 | 16384 | |||||||||
| 16 | 20 | 36 | 20 | 56 | 20 | 76 | 0 | 96 | 32768 | |||||||||
| 17 | 40 | 37 | 40 | 57 | 40 | 77 | 0 | 97 | 65536 | |||||||||
| 18 | 0 | Unused | 38 | 80 | 58 | 80 | 78 | 0 | 98 | 0 | Unused | |||||||
| 19 | P2 | Position identifier | 39 | P4 | Position identifier | 59 | P6 | Position identifier | 79 | P8 | Position identifier | 99 | P0 | Position identifier |
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