Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/26/2021   10:30:28   (  -0.03,-137.24) (  -0.10,-136.81)   48.76                80
 01/28/2021   22:33:40   (   0.02,-137.24) (  -0.06,-137.58)   39.29                80
 01/29/2021   22:17:36   (   0.02,-137.24) (   0.96,-133.05)  477.07                80
 01/31/2021   10:39:23   (  -0.01,-137.24) (   0.25,-138.32)  123.43                80
 02/01/2021   10:17:58   (  -0.02,-137.23) (  -0.77,-133.79)  392.41                80
 02/02/2021   22:39:55   (   0.02,-137.22) (  -0.41,-139.09)  213.60                80
 02/03/2021   22:23:50   (   0.02,-137.21) (   0.61,-134.56)  302.00                80
 02/05/2021   10:45:39   (  -0.01,-137.21) (   0.55,-139.84)  299.48                80
 02/06/2021   10:24:13   (  -0.01,-137.19) (  -0.42,-135.30)  215.65                80
 02/07/2021   22:46:09   (  -0.01,-137.16) (  -0.76,-140.60)  391.62                80
 02/08/2021   22:30:04   (  -0.01,-137.15) (   0.21,-136.06)  123.11                80