Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 6 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/28/2021   18:39:08   (   0.05, -75.14) (  -0.74, -78.79)  415.54                80
 06/29/2021   18:23:04   (   0.05, -75.14) (   0.24, -74.25)  100.80                80
 07/02/2021   06:26:09   (  -0.05, -75.14) (  -0.11, -75.00)   16.50                80
 07/04/2021   18:26:42   (   0.06, -75.16) (  -0.10, -75.77)   70.61                80
 07/05/2021   18:10:39   (   0.06, -75.17) (   0.94, -71.25)  446.60                80
 07/07/2021   06:29:48   (  -0.07, -75.18) (   0.23, -76.53)  153.46                80
 07/08/2021   06:13:45   (  -0.07, -75.19) (  -0.81, -72.00)  363.68                80
 07/09/2021   18:33:02   (   0.08, -75.20) (  -0.37, -77.31)  239.74                80
 07/10/2021   18:16:57   (   0.08, -75.21) (   0.61, -72.77)  277.86                80