Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/13/2021   22:33:40   (   0.03,-137.23) (  -0.06,-137.59)   41.22                80
 02/14/2021   22:17:35   (   0.03,-137.22) (   0.97,-133.06)  475.15                80
 02/16/2021   10:39:22   (  -0.02,-137.22) (   0.24,-138.32)  126.24                80
 02/17/2021   10:17:58   (  -0.03,-137.21) (  -0.79,-133.79)  389.75                80
 02/18/2021   22:39:54   (   0.02,-137.21) (  -0.38,-139.10)  215.00                80
 02/19/2021   22:23:49   (   0.02,-137.20) (   0.59,-134.56)  300.66                80
 02/21/2021   10:45:37   (  -0.01,-137.18) (   0.56,-139.83)  301.86                80
 02/22/2021   10:24:12   (   0.00,-137.17) (  -0.41,-135.29)  213.35                80
 02/23/2021   22:46:08   (  -0.01,-137.15) (  -0.76,-140.60)  392.97                80
 02/24/2021   22:30:02   (  -0.00,-137.13) (   0.22,-136.06)  121.64                80