Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/01/2021   09:52:26   (  -0.16,-128.22) (  -0.34,-127.34)   99.60                80
 03/02/2021   22:14:22   (   0.15,-128.29) (  -0.82,-132.65)  497.47                80
 03/03/2021   21:58:18   (   0.16,-128.31) (   0.21,-128.12)   21.08                80
 03/06/2021   10:01:21   (  -0.15,-128.31) (  -0.05,-128.86)   62.32                80
 03/07/2021   09:39:55   (  -0.15,-128.32) (  -1.02,-124.32)  455.09                80
 03/08/2021   22:01:52   (   0.14,-128.37) (  -0.14,-129.63)  143.62                80
 03/09/2021   21:45:47   (   0.14,-128.38) (   0.89,-125.10)  374.24                80
 03/11/2021   10:07:34   (  -0.12,-128.37) (   0.30,-130.37)  226.93                80
 03/12/2021   09:46:09   (  -0.13,-128.38) (  -0.68,-125.83)  290.26                80
 03/13/2021   22:08:05   (   0.12,-128.42) (  -0.48,-131.13)  309.57                80
 03/14/2021   21:52:01   (   0.12,-128.43) (   0.56,-126.61)  208.15                80