In (1 ) we find this table:
| TRAL | MA-9 |
PRA | |||
| Channel | Frequency (MHz) | Channel | Frequency (MHz) | Channel | Frequency (MHz) |
| 00 | 61 | 04(4) | 203 | 1 | 132.4 |
| 01 | 66 | 05(4) | 211 | 2 | 136.7 |
| 02 | 71 | 06(4) | 219 | 3 | 142.4 |
| 03 | 76 | 07(4) | 232 | 4 | 147.0 |
| 04 | 08(4) | 240 | 5 | 126.7 | |
| 05 | 09(4) | 248 | MII-MIII | MII-MIII | |
| 06 | 10(4) | 164 | 6(044) | 203.3 | |
| 07 | 145 | 11(4) | 166 | 7(054) | 211.3 |
| 08 | 164,5 | 12(4) | 180 | 8(064) | 219.3 |
| 09 | 180 | 13(4) | 182 | 9(070) | 231.3 |
| 10 | 192 | 14(4) | 190 | 10(080) | 239.3 |
| 15(4) | 192 | 11(090) | 247.3 | ||
Most of these frequencies can be found elsewhere and are well known. The signifiance of the channel designations an the terms PRA and MII-MIII are unclear. More works needs to be done, but M probably stands for "meter-band". This is evident from a catalog from NPO-IT in which units are described as working in the meter band which is designated MI-MII-MIII and in the "decimeter-band" which is designated DI,DII or DIV. PRA probably stands for , i.e. "Receiving and recording equipment".
Tral is the very early telemetry system used on i.a. the R-7 missile and Sputnik-3.
