Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2021   06:24:16   (  -0.12, -75.20) (  -0.16, -75.11)   11.48                80
 09/22/2021   18:27:29   (   0.12, -75.21) (  -0.01, -75.88)   75.81                80
 09/23/2021   18:11:25   (   0.12, -75.22) (   1.00, -71.35)  441.39                80
 09/25/2021   06:33:13   (  -0.12, -75.23) (   0.17, -76.62)  157.44                80
 09/26/2021   06:11:49   (  -0.12, -75.24) (  -0.83, -72.09)  359.71                80
 09/27/2021   18:36:25   (   0.12, -75.25) (  -0.39, -77.38)  243.54                80
 09/28/2021   18:15:01   (   0.13, -75.26) (   0.68, -72.86)  273.93                80
 09/30/2021   06:39:30   (  -0.12, -75.29) (   0.50, -78.13)  324.12                80
 10/01/2021   06:18:05   (  -0.13, -75.30) (  -0.51, -73.60)  193.40                80