Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 1 19.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/19/2021   18:38:45   (   0.02, -75.22) (  -0.78, -78.74)  401.00                80
 01/20/2021   18:22:40   (   0.02, -75.23) (   0.24, -74.21)  116.51                80
 01/22/2021   06:44:28   (   0.02, -75.25) (   0.96, -79.47)  481.62                80
 01/23/2021   06:23:03   (   0.01, -75.26) (  -0.06, -74.94)   35.78                80
 01/25/2021   18:26:15   (  -0.01, -75.29) (  -0.11, -75.72)   49.16                80
 01/26/2021   18:10:11   (  -0.00, -75.30) (   0.91, -71.19)  468.70                80
 01/28/2021   06:31:59   (   0.00, -75.33) (   0.24, -76.47)  129.54                80
 01/29/2021   06:10:34   (  -0.00, -75.34) (  -0.79, -71.94)  388.41                80
 01/30/2021   18:32:31   (   0.00, -75.37) (  -0.39, -77.24)  213.42                80
 01/31/2021   18:16:25   (   0.00, -75.39) (   0.58, -72.70)  305.22                80