Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 6 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/27/2021   06:19:50   (  -0.04, -75.14) (  -0.42, -73.47)  189.44                80
 06/28/2021   18:39:07   (   0.05, -75.14) (  -0.78, -78.78)  415.57                80
 06/29/2021   18:23:04   (   0.05, -75.14) (   0.26, -74.25)  100.79                80
 07/02/2021   06:23:29   (  -0.05, -75.14) (  -0.07, -74.99)   16.53                80
 07/04/2021   18:26:43   (   0.06, -75.16) (  -0.09, -75.78)   70.47                80
 07/05/2021   18:10:39   (   0.06, -75.17) (   0.95, -71.25)  446.72                80
 07/07/2021   06:29:48   (  -0.07, -75.18) (   0.22, -76.53)  153.23                80
 07/08/2021   06:13:44   (  -0.07, -75.19) (  -0.76, -71.99)  363.93                80
 07/09/2021   18:33:02   (   0.08, -75.20) (  -0.37, -77.31)  239.56                80
 07/10/2021   18:16:58   (   0.08, -75.22) (   0.61, -72.77)  278.06                80