Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/23/2020   21:43:17   (   0.18,-128.11) (   0.88,-125.11)  341.87                80
 04/25/2020   10:07:43   (  -0.15,-128.14) (   0.37,-130.37)  254.13                80
 04/26/2020   09:46:20   (  -0.17,-128.16) (  -0.71,-125.85)  263.62                80
 04/27/2020   22:10:55   (   0.14,-128.17) (  -0.54,-131.14)  338.49                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.48,-126.61)  179.21                80
 04/30/2020   10:13:58   (  -0.12,-128.21) (   0.71,-131.87)  417.57                80
 05/01/2020   09:52:34   (  -0.14,-128.22) (  -0.31,-127.34)   99.42                80
 05/03/2020   21:55:45   (   0.12,-128.23) (   0.15,-128.12)   12.95                80
 05/06/2020   10:01:28   (  -0.11,-128.26) (   0.02,-128.85)   67.48                80