Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 9 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2021   09:49:54   (   0.38,-127.92) (  -0.06,-125.83)  237.21                80
 09/21/2021   22:09:12   (  -0.37,-127.83) (  -1.11,-131.14)  377.10                80
 09/22/2021   21:53:07   (  -0.38,-127.80) (  -0.11,-126.61)  136.08                80
 09/24/2021   10:12:16   (   0.36,-127.79) (   1.28,-131.88)  465.74                80
 09/25/2021   09:56:11   (   0.37,-127.76) (   0.27,-127.35)   47.23                80
 09/27/2021   21:56:43   (  -0.35,-127.63) (  -0.49,-128.11)   55.46                80
 09/28/2021   21:40:38   (  -0.36,-127.59) (   0.52,-123.58)  456.87                80
 09/30/2021   09:59:48   (   0.34,-127.57) (   0.60,-128.86)  146.77                80
 10/01/2021   09:43:42   (   0.34,-127.52) (  -0.35,-124.31)  365.36                80
 10/02/2021   22:03:00   (  -0.32,-127.42) (  -0.80,-129.62)  250.82                80
 10/03/2021   21:46:55   (  -0.33,-127.38) (   0.21,-125.09)  260.98                80