Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/23/2020   09:40:01   (  -0.06,-128.25) (  -0.98,-124.29)  452.18                80
 05/24/2020   22:04:36   (   0.04,-128.22) (  -0.25,-129.58)  154.81                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.78,-125.05)  359.94                80
 05/27/2020   10:07:38   (  -0.03,-128.19) (   0.47,-130.31)  241.23                80
 05/28/2020   09:46:13   (  -0.04,-128.17) (  -0.57,-125.78)  272.78                80
 05/29/2020   22:10:49   (   0.02,-128.13) (  -0.66,-131.07)  335.84                80
 05/30/2020   21:49:24   (   0.03,-128.11) (   0.38,-126.54)  178.40                80
 06/01/2020   10:13:51   (  -0.01,-128.09) (   0.81,-131.81)  422.88                80
 06/02/2020   09:52:27   (  -0.02,-128.07) (  -0.22,-127.28)   90.71                80
 06/04/2020   21:58:17   (   0.01,-127.98) (  -0.01,-128.03)    6.12                80