Simultaneous Nadir Overpasses (SNOs) between GOES-17 and NPP
TLE Epoch: 2020 7 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 07/20/2020   22:36:29   (  -0.03,-137.19) (  -0.08,-137.53)   37.68                80
 07/21/2020   22:15:05   (  -0.03,-137.19) (   0.91,-132.99)  478.24                80
 07/23/2020   10:36:53   (   0.03,-137.18) (   0.28,-138.26)  123.27                80
 07/24/2020   10:20:49   (   0.03,-137.17) (  -0.71,-133.73)  392.25                80
 07/25/2020   22:40:06   (  -0.03,-137.16) (  -0.48,-139.03)  213.88                80
 07/26/2020   22:24:03   (  -0.03,-137.15) (   0.57,-134.51)  301.34                80
 07/28/2020   10:43:11   (   0.03,-137.13) (   0.62,-139.78)  301.33                80
 07/29/2020   10:27:06   (   0.03,-137.12) (  -0.37,-135.24)  213.35                80
 07/30/2020   22:46:24   (  -0.01,-137.10) (  -0.82,-140.55)  394.42                80
 07/31/2020   22:30:20   (   0.02,-137.08) (   0.23,-136.03)  119.18                80