Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 9 13.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/14/2021   06:39:24   (  -0.13, -75.20) (   0.53, -78.12)  333.62                80
 09/15/2021   06:17:59   (  -0.14, -75.20) (  -0.47, -73.59)  182.65                80
 09/16/2021   18:39:57   (   0.14, -75.20) (  -0.70, -78.90)  421.93                80
 09/17/2021   18:23:53   (   0.15, -75.21) (   0.36, -74.38)   95.03                80
 09/20/2021   06:24:17   (  -0.15, -75.23) (  -0.19, -75.12)   13.92                80
 09/22/2021   18:27:30   (   0.15, -75.26) (   0.03, -75.89)   70.97                80
 09/23/2021   18:11:25   (   0.15, -75.28) (   1.03, -71.36)  447.25                80
 09/25/2021   06:33:14   (  -0.15, -75.31) (   0.14, -76.63)  149.70                80
 09/26/2021   06:11:49   (  -0.15, -75.33) (  -0.86, -72.10)  368.48                80