Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/27/2020   22:10:55   (   0.14,-128.17) (  -0.54,-131.14)  338.11                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.48,-126.61)  179.73                80
 04/30/2020   10:13:58   (  -0.12,-128.22) (   0.71,-131.87)  416.66                80
 05/01/2020   09:52:34   (  -0.14,-128.23) (  -0.32,-127.34)  100.47                80
 05/03/2020   21:55:45   (   0.12,-128.24) (   0.16,-128.12)   14.24                80
 05/06/2020   10:01:28   (  -0.11,-128.27) (   0.01,-128.85)   65.67                80
 05/07/2020   09:40:04   (  -0.13,-128.28) (  -1.02,-124.32)  450.78                80
 05/08/2020   22:04:39   (   0.10,-128.27) (  -0.21,-129.62)  154.00                80
 05/09/2020   21:43:15   (   0.12,-128.27) (   0.82,-125.09)  362.52                80