Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 4 24.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/25/2020   10:07:44   (  -0.15,-128.14) (   0.36,-130.37)  253.94                80
 04/26/2020   09:46:19   (  -0.17,-128.16) (  -0.67,-125.84)  263.84                80
 04/27/2020   22:10:56   (   0.14,-128.17) (  -0.53,-131.14)  338.29                80
 04/28/2020   21:49:31   (   0.16,-128.19) (   0.50,-126.61)  179.43                80
 04/30/2020   10:13:58   (  -0.12,-128.22) (   0.69,-131.88)  417.16                80
 05/01/2020   09:52:34   (  -0.14,-128.22) (  -0.33,-127.35)   99.85                80
 05/03/2020   21:55:46   (   0.12,-128.23) (   0.17,-128.12)   13.72                80
 05/06/2020   10:01:29   (  -0.11,-128.26) (  -0.01,-128.86)   66.82                80
 05/07/2020   09:40:04   (  -0.13,-128.27) (  -1.03,-124.33)  449.60                80