Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/03/2021   22:30:52   (  -0.03,-137.21) (   0.19,-136.16)  119.57                80
 08/05/2021   10:52:41   (   0.03,-137.19) (   0.95,-141.44)  482.88                80
 08/06/2021   10:31:17   (   0.02,-137.18) (  -0.04,-136.90)   32.26                80
 08/08/2021   22:34:31   (   0.01,-137.16) (  -0.11,-137.68)   59.28                80
 08/09/2021   22:18:26   (   0.01,-137.15) (   0.88,-133.15)  455.77                80
 08/11/2021   10:37:35   (  -0.00,-137.13) (   0.31,-138.42)  147.68                80
 08/12/2021   10:21:31   (  -0.00,-137.11) (  -0.73,-133.89)  367.02                80
 08/13/2021   22:40:48   (  -0.00,-137.09) (  -0.45,-139.20)  240.03                80
 08/14/2021   22:24:44   (   0.00,-137.07) (   0.54,-134.66)  274.11                80
 08/16/2021   10:43:52   (  -0.01,-137.03) (   0.66,-139.93)  330.96                80