Let me preface with, I am not sure, but I suspect:
This looks like it may be STANAG 4539 out of UK DHFCS. This should be sequencing, frequency hopping, through 20 channels. In sequence: 2082, 2088, 2097, 2501, 2688, 3312, 3318, 3327, 4022, 4028, 4037, 4782, 4788, 4797, 5742, 5748, 5757, 7807, 7813, and 7822 kHz.
T!