Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 15.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/15/2021   10:38:45   (   0.01,-137.22) (   0.29,-138.55)  150.90                80
 11/16/2021   10:22:42   (   0.01,-137.22) (  -0.72,-134.02)  365.50                80
 11/17/2021   22:42:00   (  -0.01,-137.22) (  -0.46,-139.33)  240.04                80
 11/18/2021   22:25:57   (  -0.01,-137.22) (   0.55,-134.80)  275.97                80
 11/20/2021   10:45:06   (   0.01,-137.22) (   0.66,-140.07)  324.97                80
 11/21/2021   10:29:03   (   0.01,-137.21) (  -0.35,-135.54)  190.47                80
 11/22/2021   22:48:21   (  -0.01,-137.19) (  -0.83,-140.85)  416.61                80
 11/23/2021   22:32:18   (  -0.01,-137.18) (   0.18,-136.32)   98.37                80
 11/26/2021   10:32:43   (   0.01,-137.16) (   0.01,-137.06)   11.14                80
 11/28/2021   22:35:58   (  -0.00,-137.11) (  -0.17,-137.84)   82.96                80