Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 7.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/07/2021   22:23:47   (   0.05,-137.22) (   0.66,-134.57)  302.54                80
 03/09/2021   10:45:35   (  -0.04,-137.20) (   0.53,-139.83)  299.66                80
 03/10/2021   10:24:09   (  -0.04,-137.19) (  -0.44,-135.29)  216.26                80
 03/11/2021   22:46:05   (   0.03,-137.19) (  -0.72,-140.60)  387.90                80
 03/12/2021   22:30:00   (   0.03,-137.19) (   0.26,-136.06)  128.01                80
 03/14/2021   10:51:47   (  -0.03,-137.17) (   0.93,-141.32)  474.40                80
 03/15/2021   10:30:23   (  -0.03,-137.16) (  -0.11,-136.80)   41.08                80
 03/17/2021   22:33:34   (   0.03,-137.14) (  -0.07,-137.56)   48.86                80
 03/18/2021   22:17:29   (   0.03,-137.12) (   0.97,-133.04)  466.17                80
 03/20/2021   10:39:15   (  -0.02,-137.09) (   0.27,-138.29)  137.69                80