Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/09/2021   10:49:11   (  -0.02,-137.22) (   0.93,-141.32)  467.44                80
 01/10/2021   10:33:07   (  -0.00,-137.22) (  -0.09,-136.79)   48.89                80
 01/12/2021   22:33:39   (  -0.02,-137.21) (  -0.10,-137.56)   40.34                80
 01/13/2021   22:17:34   (  -0.02,-137.20) (   0.92,-133.03)  475.24                80
 01/15/2021   10:39:23   (   0.02,-137.19) (   0.24,-138.31)  126.84                80
 01/16/2021   10:17:57   (   0.01,-137.18) (  -0.72,-133.77)  388.62                80
 01/17/2021   22:39:54   (  -0.01,-137.17) (  -0.42,-139.08)  217.39                80
 01/18/2021   22:23:50   (  -0.01,-137.16) (   0.60,-134.55)  297.91                80
 01/20/2021   10:45:37   (   0.01,-137.15) (   0.61,-139.82)  304.54                80
 01/21/2021   10:24:13   (   0.01,-137.13) (  -0.40,-135.29)  210.48                80