Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/26/2021   10:40:05   (   0.03,-137.16) (   0.28,-138.40)  140.59                80
 07/27/2021   10:18:41   (   0.03,-137.15) (  -0.70,-133.86)  374.51                80
 07/28/2021   22:40:38   (  -0.03,-137.13) (  -0.49,-139.17)  231.66                80
 07/29/2021   22:24:33   (  -0.03,-137.12) (   0.49,-134.63)  283.30                80
 07/31/2021   10:46:23   (   0.03,-137.10) (   0.65,-139.91)  320.02                80
 08/01/2021   10:24:58   (   0.03,-137.08) (  -0.33,-135.37)  194.38                80
 08/02/2021   22:46:56   (  -0.02,-137.06) (  -0.86,-140.68)  413.32                80
 08/03/2021   22:30:52   (  -0.01,-137.04) (   0.19,-136.16)  100.40                80
 08/06/2021   10:31:17   (  -0.01,-136.98) (  -0.03,-136.90)    8.88                80
 08/08/2021   22:34:30   (   0.01,-136.91) (  -0.17,-137.67)   86.83                80