Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/18/2021   18:26:29   (   0.03, -75.23) (  -0.10, -75.73)   58.34                80
 06/19/2021   18:10:26   (   0.03, -75.21) (   0.93, -71.21)  456.24                80
 06/21/2021   06:29:35   (  -0.04, -75.18) (   0.24, -76.48)  147.93                80
 06/22/2021   06:13:31   (  -0.04, -75.17) (  -0.73, -71.95)  366.58                80
 06/23/2021   18:32:49   (   0.05, -75.15) (  -0.41, -77.26)  240.58                80
 06/24/2021   18:16:44   (   0.04, -75.14) (   0.57, -72.73)  274.26                80
 06/26/2021   06:35:54   (  -0.05, -75.12) (   0.60, -78.00)  329.04                80
 06/27/2021   06:19:50   (  -0.05, -75.11) (  -0.43, -73.48)  186.14                80
 06/28/2021   18:39:08   (   0.06, -75.10) (  -0.76, -78.78)  419.94                80
 06/29/2021   18:23:03   (   0.05, -75.10) (   0.21, -74.25)   96.08                80
 07/02/2021   06:26:09   (  -0.06, -75.10) (  -0.08, -75.00)   11.09                80