Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NPP
TLE Epoch: 2021 9 10.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/10/2021   06:11:43   (  -0.13, -75.20) (  -0.83, -72.08)  355.23                80
 09/11/2021   18:33:40   (   0.14, -75.21) (  -0.35, -77.39)  248.64                80
 09/12/2021   18:17:36   (   0.14, -75.21) (   0.65, -72.86)  268.12                80
 09/14/2021   06:39:24   (  -0.14, -75.22) (   0.52, -78.13)  331.82                80
 09/15/2021   06:18:00   (  -0.15, -75.22) (  -0.54, -73.61)  184.94                80
 09/16/2021   18:39:57   (   0.15, -75.23) (  -0.69, -78.90)  418.58                80
 09/17/2021   18:23:53   (   0.15, -75.24) (   0.37, -74.38)   98.85                80
 09/19/2021   06:45:42   (  -0.15, -75.27) (   0.80, -79.65)  499.36                80
 09/20/2021   06:24:17   (  -0.16, -75.28) (  -0.20, -75.12)   18.55                80
 09/22/2021   18:27:30   (   0.16, -75.33) (   0.04, -75.90)   64.64                80
 09/23/2021   18:11:25   (   0.16, -75.35) (   1.05, -71.36)  454.03                80