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

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/15/2021   22:02:51   (   0.22,-128.14) (  -0.16,-129.75)  183.48                80
 08/16/2021   21:46:47   (   0.21,-128.15) (   0.89,-125.23)  334.17                80
 08/18/2021   10:05:56   (  -0.23,-128.26) (   0.30,-130.50)  255.08                80
 08/19/2021   09:49:52   (  -0.23,-128.27) (  -0.75,-125.97)  262.37                80
 08/20/2021   22:09:09   (   0.25,-128.19) (  -0.43,-131.28)  351.58                80
 08/21/2021   21:53:05   (   0.24,-128.20) (   0.56,-126.75)  165.68                80
 08/23/2021   10:12:14   (  -0.26,-128.31) (   0.57,-132.03)  424.04                80
 08/24/2021   09:56:10   (  -0.25,-128.32) (  -0.43,-127.49)   93.49                80
 08/26/2021   21:56:43   (   0.26,-128.25) (   0.24,-128.27)    3.35                80