Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 4 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/10/2021   21:45:33   (   0.02,-128.14) (   0.70,-125.01)  356.66                80
 04/12/2021   10:07:20   (  -0.01,-128.09) (   0.45,-130.28)  248.11                80
 04/13/2021   09:45:55   (  -0.02,-128.07) (  -0.54,-125.74)  265.19                80
 04/14/2021   22:07:50   (   0.01,-128.03) (  -0.68,-131.03)  342.53                80
 04/15/2021   21:51:46   (   0.01,-128.00) (   0.37,-126.51)  171.15                80
 04/17/2021   10:13:32   (  -0.00,-127.96) (   0.84,-131.76)  433.58                80
 04/18/2021   09:52:07   (  -0.01,-127.92) (  -0.15,-127.23)   78.93                80
 04/20/2021   21:55:17   (   0.00,-127.83) (  -0.02,-128.00)   18.42                80
 04/21/2021   21:39:12   (   0.01,-127.80) (   0.98,-123.46)  494.57                80
 04/23/2021   10:00:58   (   0.01,-127.75) (   0.23,-128.72)  110.73                80