- L1 (1575.42): nav msg, coarse-acquisition (C/A) and
encrypted P(Y), L1C on blk III satellites
- L2 (1227.60) P(Y) plus L2C on blkIIR-M and newer satellites
- L3 (1381.05) Nuclear detection
- L4 (1379.913) being studied for additional ionospheric
- L5 (1176.45 +/- 12.5) blk F launch 2009?
- S2 (2228.524 BW:.35Mhz null to Null. LHCP . downlink