Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/14/2021   22:17:35   (   0.04,-137.22) (   0.96,-133.06)  474.91                80
 02/16/2021   10:39:23   (  -0.03,-137.22) (   0.19,-138.33)  126.43                80
 02/17/2021   10:17:58   (  -0.03,-137.21) (  -0.78,-133.79)  389.60                80
 02/18/2021   22:39:54   (   0.03,-137.21) (  -0.39,-139.10)  215.26                80
 02/19/2021   22:23:50   (   0.03,-137.20) (   0.64,-134.57)  300.39                80
 02/21/2021   10:45:37   (  -0.02,-137.18) (   0.56,-139.83)  302.12                80
 02/22/2021   10:24:11   (  -0.01,-137.17) (  -0.41,-135.29)  213.07                80
 02/23/2021   22:46:08   (  -0.00,-137.15) (  -0.76,-140.60)  393.10                80
 02/24/2021   22:30:02   (  -0.01,-137.13) (   0.22,-136.06)  121.60                80
 02/26/2021   10:51:51   (   0.01,-137.10) (   0.93,-141.34)  482.28                80
 02/27/2021   10:30:25   (   0.00,-137.08) (  -0.04,-136.80)   31.99                80