Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/07/2021   09:39:56   (  -0.15,-128.31) (  -1.04,-124.32)  454.57                80
 03/08/2021   22:01:52   (   0.13,-128.37) (  -0.13,-129.63)  142.83                80
 03/09/2021   21:45:46   (   0.13,-128.39) (   0.85,-125.09)  375.01                80
 03/11/2021   10:07:34   (  -0.12,-128.36) (   0.34,-130.36)  227.48                80
 03/12/2021   09:46:09   (  -0.13,-128.37) (  -0.69,-125.83)  289.67                80
 03/13/2021   22:08:05   (   0.12,-128.42) (  -0.47,-131.14)  308.86                80
 03/14/2021   21:52:00   (   0.12,-128.43) (   0.51,-126.60)  208.84                80
 03/16/2021   10:13:47   (  -0.11,-128.42) (   0.67,-131.86)  393.00                80
 03/17/2021   09:52:23   (  -0.12,-128.42) (  -0.36,-127.34)  123.71                80
 03/18/2021   22:14:18   (   0.10,-128.45) (  -0.85,-132.63)  476.65                80
 03/19/2021   21:58:14   (   0.11,-128.46) (   0.19,-128.10)   40.36                80