Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2021 8 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2021   10:31:25   (   0.05,-137.20) (  -0.01,-136.91)   32.45                80
 08/24/2021   22:34:39   (  -0.05,-137.20) (  -0.13,-137.69)   55.70                80
 08/25/2021   22:18:35   (  -0.05,-137.20) (   0.86,-133.16)  461.05                80
 08/27/2021   10:40:23   (   0.04,-137.22) (   0.32,-138.43)  138.39                80
 08/28/2021   10:18:59   (   0.04,-137.22) (  -0.67,-133.89)  377.84                80
 08/29/2021   22:40:56   (  -0.04,-137.20) (  -0.51,-139.20)  228.26                80
 08/30/2021   22:24:52   (  -0.04,-137.20) (   0.54,-134.68)  287.52                80
 09/01/2021   10:44:01   (   0.03,-137.20) (   0.64,-139.95)  313.42                80
 09/02/2021   10:27:56   (   0.03,-137.19) (  -0.35,-135.41)  201.76                80
 09/03/2021   22:47:13   (  -0.01,-137.16) (  -0.83,-140.72)  406.11                80
 09/04/2021   22:31:10   (  -0.00,-137.15) (   0.22,-136.20)  108.74                80