Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/05/2021   10:52:41   (   0.03,-137.19) (   0.97,-141.43)  482.84                80
 08/06/2021   10:31:17   (   0.02,-137.18) (  -0.07,-136.91)   32.46                80
 08/08/2021   22:34:30   (   0.01,-137.17) (  -0.13,-137.68)   59.22                80
 08/09/2021   22:18:27   (   0.01,-137.15) (   0.92,-133.16)  455.93                80
 08/11/2021   10:37:35   (  -0.00,-137.13) (   0.28,-138.42)  147.57                80
 08/12/2021   10:21:31   (   0.00,-137.11) (  -0.71,-133.89)  367.13                80
 08/13/2021   22:40:48   (  -0.00,-137.09) (  -0.48,-139.19)  239.80                80
 08/14/2021   22:24:43   (  -0.00,-137.07) (   0.51,-134.66)  274.35                80
 08/16/2021   10:43:53   (  -0.01,-137.03) (   0.62,-139.94)  330.84                80
 08/17/2021   10:27:48   (  -0.01,-137.01) (  -0.37,-135.41)  182.67                80