Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 11 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 11/21/2021   10:28:57   (   0.01,-137.21) (  -0.37,-135.51)  193.33                80
 11/22/2021   22:48:11   (  -0.01,-137.20) (  -0.85,-140.81)  412.44                80
 11/23/2021   22:32:06   (  -0.01,-137.19) (   0.17,-136.28)  103.24                80
 11/25/2021   10:51:12   (   0.01,-137.17) (   1.00,-141.54)  498.79                80
 11/26/2021   10:32:27   (   0.01,-137.16) (  -0.02,-137.01)   16.43                80
 11/28/2021   22:35:35   (  -0.00,-137.12) (  -0.17,-137.77)   75.48                80
 11/29/2021   22:19:30   (  -0.01,-137.10) (   0.86,-133.24)  439.42                80
 12/01/2021   10:41:16   (   0.00,-137.07) (   0.32,-138.51)  163.71                80
 12/02/2021   10:19:51   (   0.01,-137.05) (  -0.71,-133.98)  350.58                80
 12/03/2021   22:41:45   (  -0.00,-137.01) (  -0.50,-139.27)  258.17                80
 12/04/2021   22:25:40   (  -0.00,-136.98) (   0.53,-134.74)  255.50                80