Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 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)
 02/08/2021   22:30:05   (   0.03,-137.20) (   0.29,-136.08)  128.35                80
 02/10/2021   10:51:53   (  -0.02,-137.17) (   0.91,-141.34)  475.16                80
 02/11/2021   10:30:28   (  -0.01,-137.16) (  -0.11,-136.81)   40.08                80
 02/13/2021   22:33:39   (   0.01,-137.14) (  -0.09,-137.58)   50.39                80
 02/14/2021   22:17:34   (   0.01,-137.12) (   0.93,-133.05)  464.46                80
 02/16/2021   10:39:22   (  -0.01,-137.09) (   0.28,-138.31)  139.82                80
 02/17/2021   10:17:57   (  -0.01,-137.07) (  -0.75,-133.79)  374.65                80
 02/18/2021   22:39:53   (   0.01,-137.05) (  -0.47,-139.08)  231.79                80
 02/19/2021   22:23:48   (   0.00,-137.03) (   0.56,-134.55)  282.42                80
 02/21/2021   10:45:35   (   0.00,-136.98) (   0.66,-139.81)  322.95                80