Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 9 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)
 09/14/2020   21:43:44   (   0.10,-128.16) (   0.80,-125.07)  352.40                80
 09/16/2020   10:05:32   (  -0.11,-128.24) (   0.38,-130.34)  240.21                80
 09/17/2020   09:49:27   (  -0.11,-128.26) (  -0.63,-125.81)  278.57                80
 09/18/2020   22:11:25   (   0.11,-128.25) (  -0.53,-131.12)  326.84                80
 09/19/2020   21:50:00   (   0.11,-128.27) (   0.48,-126.59)  191.48                80
 09/21/2020   10:11:49   (  -0.11,-128.33) (   0.69,-131.86)  402.28                80
 09/22/2020   09:55:44   (  -0.11,-128.35) (  -0.31,-127.32)  115.79                80
 09/23/2020   22:17:41   (   0.12,-128.33) (  -0.84,-132.63)  490.49                80
 09/24/2020   21:56:17   (   0.12,-128.34) (   0.17,-128.10)   26.97                80
 09/27/2020   09:59:21   (  -0.13,-128.40) (   0.00,-128.84)   50.65                80
 09/28/2020   09:43:17   (  -0.13,-128.41) (  -1.06,-124.32)  467.02                80