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

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/16/2021   18:39:56   (   0.13, -75.20) (  -0.71, -78.90)  421.99                80
 09/17/2021   18:23:53   (   0.14, -75.20) (   0.35, -74.38)   94.88                80
 09/20/2021   06:24:17   (  -0.14, -75.23) (  -0.18, -75.11)   13.62                80
 09/22/2021   18:27:30   (   0.14, -75.26) (   0.01, -75.89)   71.53                80
 09/23/2021   18:11:25   (   0.14, -75.27) (   1.02, -71.35)  446.58                80
 09/25/2021   06:33:13   (  -0.14, -75.30) (   0.15, -76.63)  150.38                80
 09/26/2021   06:11:49   (  -0.14, -75.32) (  -0.85, -72.09)  367.70                80
 09/27/2021   18:36:26   (   0.14, -75.34) (  -0.30, -77.40)  234.45                80
 09/28/2021   18:15:02   (   0.15, -75.36) (   0.70, -72.87)  283.94                80