Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 12 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 12/06/2021   18:24:28   (  -0.01, -75.18) (   0.15, -74.39)   90.04                80
 12/09/2021   06:27:28   (   0.00, -75.18) (  -0.02, -75.12)    7.04                80
 12/11/2021   18:27:57   (  -0.00, -75.20) (  -0.16, -75.89)   77.90                80
 12/12/2021   18:11:52   (  -0.00, -75.22) (   0.87, -71.36)  440.19                80
 12/14/2021   06:33:38   (   0.00, -75.23) (   0.28, -76.63)  157.98                80
 12/15/2021   06:12:12   (   0.01, -75.25) (  -0.69, -72.08)  360.42                80
 12/16/2021   18:34:07   (  -0.01, -75.27) (  -0.45, -77.39)  240.84                80
 12/17/2021   18:18:00   (  -0.01, -75.29) (   0.52, -72.85)  277.79                80
 12/19/2021   06:39:47   (   0.00, -75.31) (   0.64, -78.12)  319.62                80