Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 7 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)
 07/18/2021   06:26:22   (  -0.07, -75.20) (  -0.12, -75.04)   18.97                80
 07/20/2021   18:26:56   (   0.08, -75.23) (  -0.03, -75.82)   66.90                80
 07/21/2021   18:10:51   (   0.08, -75.24) (   0.95, -71.28)  450.62                80
 07/23/2021   06:30:00   (  -0.10, -75.26) (   0.20, -76.56)  148.70                80
 07/24/2021   06:13:57   (  -0.09, -75.27) (  -0.85, -72.04)  369.06                80
 07/25/2021   18:33:14   (   0.10, -75.30) (  -0.34, -77.35)  233.07                80
 07/26/2021   18:17:10   (   0.10, -75.32) (   0.64, -72.81)  285.55                80
 07/28/2021   06:36:19   (  -0.11, -75.36) (   0.51, -78.09)  311.56                80
 07/29/2021   06:20:16   (  -0.11, -75.38) (  -0.54, -73.57)  207.42                80
 07/30/2021   18:39:33   (   0.12, -75.42) (  -0.65, -78.87)  393.50                80
 07/31/2021   18:23:28   (   0.11, -75.45) (   0.34, -74.34)  125.97                80