Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/06/2021   10:31:17   (   0.03,-137.18) (  -0.04,-136.90)   32.54                80
 08/08/2021   22:34:30   (  -0.03,-137.16) (  -0.17,-137.67)   58.28                80
 08/09/2021   22:18:26   (  -0.03,-137.15) (   0.88,-133.15)  456.62                80
 08/11/2021   10:37:34   (   0.03,-137.12) (   0.32,-138.41)  147.23                80
 08/12/2021   10:21:30   (   0.03,-137.11) (  -0.67,-133.88)  367.32                80
 08/13/2021   22:40:47   (  -0.03,-137.09) (  -0.52,-139.18)  239.72                80
 08/14/2021   22:24:44   (  -0.03,-137.07) (   0.53,-134.66)  274.37                80
 08/16/2021   10:43:52   (   0.02,-137.03) (   0.66,-139.93)  330.90                80
 08/17/2021   10:27:48   (   0.01,-137.00) (  -0.33,-135.40)  182.29                80
 08/18/2021   22:47:06   (   0.01,-136.96) (  -0.80,-140.71)  427.01                80
 08/19/2021   22:31:01   (   0.01,-136.93) (   0.19,-136.18)   86.18                80