Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/23/2021   22:37:00   (  -0.03,-137.18) (  -0.16,-137.65)   53.49                80
 07/24/2021   22:18:16   (  -0.03,-137.18) (   0.88,-133.12)  461.85                80
 07/26/2021   10:40:04   (   0.03,-137.16) (   0.33,-138.39)  140.20                80
 07/27/2021   10:18:41   (   0.03,-137.15) (  -0.71,-133.87)  374.99                80
 07/28/2021   22:40:38   (  -0.04,-137.14) (  -0.48,-139.17)  231.45                80
 07/29/2021   22:24:34   (  -0.03,-137.13) (   0.50,-134.63)  283.62                80
 07/31/2021   10:46:23   (   0.03,-137.11) (   0.65,-139.91)  319.06                80
 08/01/2021   10:24:59   (   0.03,-137.10) (  -0.34,-135.38)  195.47                80
 08/02/2021   22:46:56   (  -0.02,-137.07) (  -0.86,-140.68)  412.49                80
 08/03/2021   22:30:52   (  -0.01,-137.05) (   0.19,-136.16)  101.41                80