Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/13/2021   09:59:38   (  -0.20,-128.20) (  -0.02,-128.98)   88.66                80
 08/14/2021   09:43:33   (  -0.19,-128.22) (  -1.01,-124.44)  429.59                80
 08/15/2021   22:02:51   (   0.22,-128.14) (  -0.12,-129.76)  183.79                80
 08/16/2021   21:46:47   (   0.21,-128.15) (   0.87,-125.22)  333.74                80
 08/18/2021   10:05:56   (  -0.23,-128.26) (   0.26,-130.51)  255.82                80
 08/19/2021   09:49:52   (  -0.23,-128.27) (  -0.73,-125.97)  261.51                80
 08/20/2021   22:09:09   (   0.25,-128.19) (  -0.45,-131.28)  352.46                80
 08/21/2021   21:53:05   (   0.24,-128.19) (   0.54,-126.74)  164.71                80
 08/23/2021   10:12:14   (  -0.26,-128.29) (   0.59,-132.02)  425.44                80
 08/24/2021   09:56:10   (  -0.25,-128.30) (  -0.46,-127.50)   92.03                80