Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2021   06:21:01   (  -0.01, -75.19) (  -0.39, -73.58)  183.29                80
 12/21/2021   18:40:15   (   0.02, -75.18) (  -0.81, -78.88)  421.10                80
 12/22/2021   18:24:10   (   0.01, -75.18) (   0.23, -74.35)   95.68                80
 12/25/2021   06:27:10   (  -0.01, -75.18) (  -0.06, -75.08)   12.57                80
 12/27/2021   18:27:39   (   0.02, -75.19) (  -0.10, -75.84)   73.79                80
 12/28/2021   18:11:32   (   0.01, -75.19) (   0.88, -71.30)  443.82                80
 12/30/2021   06:33:17   (  -0.01, -75.20) (   0.32, -76.56)  155.19                80
 12/31/2021   06:11:52   (  -0.00, -75.21) (  -0.72, -72.03)  362.33                80
 01/01/2022   18:33:46   (  -0.00, -75.21) (  -0.47, -77.32)  240.64                80
 01/02/2022   18:17:40   (  -0.01, -75.22) (   0.51, -72.78)  277.12                80