Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 1 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 01/25/2021   10:51:53   (  -0.03,-137.23) (   0.89,-141.34)  468.64                80
 01/26/2021   10:30:29   (  -0.03,-137.23) (  -0.13,-136.81)   47.48                80
 01/28/2021   22:33:40   (   0.01,-137.21) (  -0.10,-137.57)   42.04                80
 01/29/2021   22:17:35   (   0.01,-137.20) (   0.92,-133.04)  473.70                80
 01/31/2021   10:39:23   (  -0.01,-137.20) (   0.23,-138.32)  127.92                80
 02/01/2021   10:17:59   (  -0.01,-137.19) (  -0.79,-133.79)  387.20                80
 02/02/2021   22:39:54   (   0.01,-137.16) (  -0.45,-139.08)  219.84                80
 02/03/2021   22:23:50   (   0.02,-137.15) (   0.58,-134.56)  295.11                80
 02/05/2021   10:45:38   (  -0.01,-137.13) (   0.58,-139.83)  307.40                80
 02/06/2021   10:24:13   (  -0.00,-137.11) (  -0.39,-135.29)  207.10                80
 02/07/2021   22:46:09   (  -0.01,-137.07) (  -0.78,-140.60)  401.31                80