Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 7 30.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/31/2021   10:46:23   (   0.04,-137.21) (   0.64,-139.91)  307.90                80
 08/01/2021   10:24:59   (   0.03,-137.21) (  -0.40,-135.39)  208.42                80
 08/02/2021   22:46:57   (  -0.03,-137.21) (  -0.79,-140.69)  396.44                80
 08/03/2021   22:30:52   (  -0.02,-137.21) (   0.20,-136.16)  119.39                80
 08/05/2021   10:52:41   (  -0.02,-137.20) (   0.94,-141.44)  483.01                80
 08/06/2021   10:31:18   (  -0.02,-137.19) (  -0.11,-136.92)   32.54                80
 08/08/2021   22:34:31   (   0.01,-137.17) (  -0.09,-137.69)   58.49                80
 08/09/2021   22:18:26   (   0.01,-137.16) (   0.90,-133.15)  456.65                80
 08/11/2021   10:40:15   (  -0.01,-137.14) (   0.30,-138.42)  146.01                80
 08/12/2021   10:18:51   (  -0.00,-137.13) (  -0.75,-133.90)  368.74                80