Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2021   06:21:19   (   0.00, -75.18) (  -0.33, -73.62)  177.33                80
 12/05/2021   18:40:34   (  -0.00, -75.18) (  -0.82, -78.93)  426.68                80
 12/06/2021   18:24:28   (  -0.01, -75.18) (   0.15, -74.39)   90.12                80
 12/09/2021   06:27:28   (   0.00, -75.18) (  -0.02, -75.12)    7.08                80
 12/11/2021   18:27:57   (  -0.00, -75.21) (  -0.16, -75.89)   77.81                80
 12/12/2021   18:11:52   (  -0.00, -75.22) (   0.88, -71.36)  440.29                80
 12/14/2021   06:33:37   (   0.00, -75.24) (   0.34, -76.61)  157.94                80
 12/15/2021   06:12:12   (   0.01, -75.25) (  -0.69, -72.08)  360.47                80
 12/16/2021   18:34:07   (  -0.01, -75.27) (  -0.45, -77.39)  240.74                80
 12/17/2021   18:18:00   (  -0.01, -75.29) (   0.52, -72.85)  277.90                80