Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 3 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/08/2021   22:01:51   (   0.13,-128.37) (  -0.15,-129.63)  142.82                80
 03/09/2021   21:45:47   (   0.13,-128.38) (   0.89,-125.10)  374.96                80
 03/11/2021   10:07:34   (  -0.12,-128.36) (   0.30,-130.36)  227.72                80
 03/12/2021   09:46:09   (  -0.13,-128.37) (  -0.68,-125.82)  289.40                80
 03/13/2021   22:08:05   (   0.11,-128.42) (  -0.48,-131.13)  309.07                80
 03/14/2021   21:52:01   (   0.12,-128.43) (   0.55,-126.61)  208.58                80
 03/16/2021   10:13:47   (  -0.11,-128.41) (   0.69,-131.86)  393.46                80
 03/17/2021   09:52:22   (  -0.12,-128.42) (  -0.35,-127.33)  123.22                80
 03/18/2021   22:14:19   (   0.10,-128.45) (  -0.81,-132.64)  477.08                80
 03/19/2021   21:58:13   (   0.11,-128.45) (   0.17,-128.10)   39.91                80