Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/27/2021   10:18:41   (   0.03,-137.19) (  -0.71,-133.86)  378.73                80
 07/28/2021   22:40:38   (  -0.03,-137.19) (  -0.48,-139.17)  225.06                80
 07/29/2021   22:24:35   (  -0.03,-137.20) (   0.56,-134.65)  291.92                80
 07/31/2021   10:46:23   (   0.03,-137.21) (   0.64,-139.91)  307.56                80
 08/01/2021   10:24:59   (   0.03,-137.22) (  -0.41,-135.39)  208.88                80
 08/02/2021   22:46:57   (  -0.02,-137.21) (  -0.79,-140.70)  396.42                80
 08/03/2021   22:30:52   (  -0.01,-137.21) (   0.20,-136.16)  119.40                80
 08/05/2021   10:52:42   (  -0.02,-137.21) (   0.94,-141.44)  482.01                80
 08/06/2021   10:31:18   (  -0.01,-137.21) (  -0.10,-136.92)   33.71                80
 08/08/2021   22:34:31   (   0.01,-137.18) (  -0.10,-137.69)   57.65                80
 08/09/2021   22:18:26   (   0.00,-137.17) (   0.89,-133.15)  457.56                80