Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/30/2021   21:51:54   (   0.06,-128.35) (   0.46,-126.56)  203.87                80
 04/01/2021   10:13:41   (  -0.05,-128.32) (   0.71,-131.83)  399.73                80
 04/02/2021   09:52:16   (  -0.06,-128.30) (  -0.28,-127.29)  114.64                80
 04/03/2021   22:14:11   (   0.04,-128.28) (  -0.94,-132.58)  490.71                80
 04/04/2021   21:58:07   (   0.04,-128.27) (   0.10,-128.06)   24.20                80
 04/07/2021   10:01:08   (  -0.03,-128.22) (   0.07,-128.79)   64.87                80
 04/08/2021   09:39:43   (  -0.04,-128.19) (  -0.92,-124.25)  449.25                80
 04/09/2021   22:01:38   (   0.03,-128.17) (  -0.30,-129.55)  156.93                80
 04/10/2021   21:45:34   (   0.04,-128.16) (   0.75,-125.02)  357.84                80
 04/12/2021   10:07:20   (  -0.02,-128.13) (   0.47,-130.28)  245.13                80