Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/02/2021   22:46:56   (  -0.04,-137.21) (  -0.84,-140.68)  396.18                80
 08/03/2021   22:30:52   (  -0.03,-137.21) (   0.21,-136.16)  119.56                80
 08/05/2021   10:52:41   (   0.03,-137.19) (   0.99,-141.43)  482.75                80
 08/06/2021   10:31:17   (   0.02,-137.19) (  -0.06,-136.90)   32.46                80
 08/08/2021   22:34:31   (   0.01,-137.16) (  -0.09,-137.69)   59.23                80
 08/09/2021   22:18:27   (   0.01,-137.15) (   0.90,-133.15)  455.85                80
 08/11/2021   10:37:35   (  -0.00,-137.13) (   0.30,-138.42)  147.44                80
 08/12/2021   10:21:31   (  -0.00,-137.11) (  -0.75,-133.90)  367.27                80
 08/13/2021   22:40:48   (  -0.00,-137.09) (  -0.50,-139.19)  239.89                80
 08/14/2021   22:24:44   (  -0.00,-137.07) (   0.55,-134.67)  274.28                80