[SLS-CC] [EXTERNAL] SLS-CC Digest, Vol 177, Issue 3

[Lee, Wing-tsz (GSFC-5670)]

Hi Andrea,

We agree with you that the end points at which the Doppler profile and its negated version connects will have a derivative that’s undefined because the slope is nonzero (but very small).  However, since the Doppler effect on the carrier is simulated via a changing phase shift, which would be some integral of the Doppler frequency, the input phase shift would still be continuous.  

Conceptually, we believe that the direction of Doppler shouldn’t matter as long as 1) the phase is continuous (i.e. no phase jump at the transition point), 2) no frequency jump, and 3) the maximum Doppler rate of change is within the tracking capability of the loops, then the loops should maintain lock.

Thanks,
Wing

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Subject: [EXTERNAL] SLS-CC Digest, Vol 177, Issue 3

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