Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 3 1.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/01/2021   22:33:38   (   0.04,-137.22) (  -0.03,-137.59)   41.43                80
 03/02/2021   22:17:33   (   0.04,-137.22) (   1.00,-133.06)  475.14                80
 03/04/2021   10:39:21   (  -0.04,-137.22) (   0.20,-138.32)  125.72                80
 03/05/2021   10:17:56   (  -0.04,-137.21) (  -0.83,-133.80)  390.25                80
 03/06/2021   22:39:52   (   0.03,-137.20) (  -0.39,-139.09)  215.03                80
 03/07/2021   22:23:47   (   0.03,-137.20) (   0.65,-134.56)  300.68                80
 03/09/2021   10:45:34   (  -0.02,-137.18) (   0.55,-139.83)  301.04                80
 03/10/2021   10:24:09   (  -0.01,-137.17) (  -0.43,-135.29)  214.45                80
 03/11/2021   22:46:04   (   0.01,-137.15) (  -0.79,-140.58)  391.52                80
 03/12/2021   22:30:00   (   0.01,-137.14) (   0.25,-136.06)  123.86                80
 03/14/2021   10:51:47   (  -0.00,-137.13) (   0.95,-141.32)  478.22                80