Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 9 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 10/01/2021   06:18:04   (  -0.10, -75.19) (  -0.44, -73.58)  183.12                80
 10/02/2021   18:42:41   (   0.09, -75.20) (  -0.72, -78.89)  419.92                80
 10/03/2021   18:21:17   (   0.10, -75.21) (   0.29, -74.36)   96.87                80
 10/06/2021   06:24:20   (  -0.10, -75.21) (  -0.14, -75.10)   13.64                80
 10/08/2021   18:30:12   (   0.09, -75.24) (  -0.06, -75.86)   71.25                80
 10/09/2021   18:08:48   (   0.10, -75.25) (   0.95, -71.33)  446.05                80
 10/11/2021   06:33:16   (  -0.09, -75.25) (   0.21, -76.60)  153.58                80
 10/12/2021   06:11:52   (  -0.10, -75.26) (  -0.80, -72.07)  363.58                80
 10/13/2021   18:36:28   (   0.09, -75.28) (  -0.39, -77.37)  238.09                80
 10/14/2021   18:15:04   (   0.10, -75.30) (   0.62, -72.84)  279.70                80