Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 08/14/2021   09:43:34   (  -0.20,-128.22) (  -1.07,-124.45)  429.79                80
 08/15/2021   22:02:51   (   0.22,-128.14) (  -0.12,-129.76)  183.55                80
 08/16/2021   21:46:47   (   0.21,-128.15) (   0.87,-125.22)  334.05                80
 08/18/2021   10:05:56   (  -0.23,-128.26) (   0.26,-130.50)  255.27                80
 08/19/2021   09:49:52   (  -0.23,-128.27) (  -0.73,-125.97)  262.14                80
 08/20/2021   22:09:09   (   0.25,-128.19) (  -0.46,-131.28)  351.83                80
 08/21/2021   21:53:06   (   0.24,-128.20) (   0.59,-126.75)  165.41                80
 08/23/2021   10:12:14   (  -0.26,-128.30) (   0.59,-132.02)  424.46                80
 08/24/2021   09:56:10   (  -0.25,-128.31) (  -0.46,-127.50)   93.08                80
 08/26/2021   21:59:23   (   0.26,-128.24) (   0.27,-128.27)    3.65                80