Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/04/2021   10:39:21   (  -0.04,-137.22) (   0.21,-138.32)  125.90                80
 03/05/2021   10:17:56   (  -0.04,-137.21) (  -0.82,-133.79)  390.11                80
 03/06/2021   22:39:51   (   0.04,-137.21) (  -0.40,-139.09)  214.65                80
 03/07/2021   22:23:47   (   0.03,-137.20) (   0.64,-134.56)  301.10                80
 03/09/2021   10:45:34   (  -0.02,-137.18) (   0.56,-139.83)  300.99                80
 03/10/2021   10:24:09   (  -0.01,-137.17) (  -0.42,-135.29)  214.55                80
 03/11/2021   22:46:05   (   0.01,-137.16) (  -0.74,-140.59)  390.89                80
 03/12/2021   22:30:00   (   0.01,-137.15) (   0.24,-136.05)  124.55                80
 03/14/2021   10:51:47   (  -0.00,-137.13) (   0.95,-141.32)  477.90                80
 03/15/2021   10:30:22   (  -0.01,-137.12) (  -0.09,-136.79)   37.15                80