Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 4 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/05/2021   10:39:11   (  -0.04,-137.21) (   0.21,-138.28)  121.67                80
 04/06/2021   10:17:46   (  -0.04,-137.21) (  -0.84,-133.75)  394.88                80
 04/07/2021   22:39:41   (   0.03,-137.22) (  -0.38,-139.04)  208.49                80
 04/08/2021   22:23:37   (   0.03,-137.22) (   0.66,-134.52)  308.06                80
 04/10/2021   10:45:23   (  -0.03,-137.21) (   0.55,-139.78)  293.00                80
 04/11/2021   10:23:59   (  -0.03,-137.20) (  -0.49,-135.25)  223.20                80
 04/12/2021   22:45:54   (   0.03,-137.20) (  -0.72,-140.54)  381.10                80
 04/13/2021   22:29:49   (   0.03,-137.19) (   0.27,-136.01)  134.82                80
 04/15/2021   10:51:36   (  -0.03,-137.18) (   0.89,-141.28)  467.30                80
 04/16/2021   10:30:10   (  -0.03,-137.16) (  -0.10,-136.74)   48.06                80