Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/06/2021   10:24:13   (  -0.03,-137.22) (  -0.44,-135.30)  218.07                80
 02/07/2021   22:46:10   (   0.03,-137.21) (  -0.74,-140.61)  386.77                80
 02/08/2021   22:30:05   (   0.02,-137.20) (   0.29,-136.08)  128.69                80
 02/10/2021   10:51:53   (   0.01,-137.18) (   0.92,-141.34)  474.26                80
 02/11/2021   10:30:27   (   0.01,-137.16) (  -0.05,-136.80)   40.85                80
 02/13/2021   22:33:39   (  -0.00,-137.14) (  -0.10,-137.58)   49.92                80
 02/14/2021   22:17:34   (   0.00,-137.13) (   0.93,-133.05)  464.97                80
 02/16/2021   10:39:22   (  -0.00,-137.09) (   0.28,-138.31)  139.10                80
 02/17/2021   10:17:57   (  -0.00,-137.08) (  -0.74,-133.78)  375.41                80
 02/18/2021   22:39:53   (  -0.00,-137.06) (  -0.48,-139.08)  231.18                80
 02/19/2021   22:23:48   (  -0.00,-137.04) (   0.55,-134.55)  283.04                80