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This paper presents a comparative performance assessment of slow frequency hopped, frequency division multiplexed waveforms through dehop-rehop partial processing and on-board processing satellite payloads under the effects of jamming. Towards application in tactical mobile satellite communications, the performances of convolutional coded symmetric differential phase shift keying (SDPSK) and 1-bit differential Gaussian minimum shift keying (GMSK) modems are examined under the influences of jamming. Uplink channel impairment is modeled as partial band noise jamming (PBNJ), and band multi-tone jamming (BMTJ) coupled with AWGN and the downlink channel is modeled as AWGN. The simulated results and comparative analysis provide designers with a reference and quantifiable measure of the difference between each satellite architecture's performance with respect to overall signal quality and antijamming (AJ) capabilities for each of the waveforms under study.