Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 6 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 06/16/2021   22:27:37   (  -0.01,-137.20) (   0.24,-136.07)  128.48                80
 06/18/2021   10:52:06   (   0.02,-137.20) (   0.93,-141.34)  472.22                80
 06/19/2021   10:30:43   (   0.01,-137.19) (  -0.10,-136.82)   43.39                80
 06/21/2021   22:36:36   (  -0.01,-137.17) (  -0.13,-137.59)   48.40                80
 06/22/2021   22:15:12   (   0.00,-137.16) (   0.90,-133.06)  466.41                80
 06/24/2021   10:39:41   (  -0.01,-137.14) (   0.27,-138.34)  136.44                80
 06/25/2021   10:18:18   (  -0.01,-137.13) (  -0.76,-133.81)  377.85                80
 06/26/2021   22:40:15   (   0.01,-137.09) (  -0.43,-139.12)  230.32                80
 06/27/2021   22:24:11   (   0.01,-137.08) (   0.55,-134.58)  283.96                80
 06/29/2021   10:43:20   (  -0.01,-137.06) (   0.62,-139.86)  319.30                80