Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 2 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/22/2021   10:24:13   (  -0.04,-137.21) (  -0.48,-135.31)  217.46                80
 02/23/2021   22:46:08   (   0.04,-137.20) (  -0.74,-140.60)  387.89                80
 02/24/2021   22:30:04   (   0.03,-137.20) (   0.29,-136.08)  128.14                80
 02/26/2021   10:51:51   (  -0.02,-137.19) (   0.91,-141.34)  472.60                80
 02/27/2021   10:30:26   (  -0.02,-137.19) (  -0.12,-136.81)   42.99                80
 03/01/2021   22:33:37   (   0.02,-137.15) (  -0.07,-137.58)   48.33                80
 03/02/2021   22:17:33   (   0.02,-137.14) (   0.96,-133.05)  466.74                80
 03/04/2021   10:39:20   (  -0.02,-137.12) (   0.24,-138.32)  135.57                80
 03/05/2021   10:17:55   (  -0.02,-137.11) (  -0.73,-133.77)  378.95                80
 03/06/2021   22:39:51   (   0.01,-137.07) (  -0.42,-139.08)  229.26                80