Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2020   09:46:17   (  -0.10,-128.31) (  -0.64,-125.82)  283.20                80
 05/13/2020   22:10:54   (   0.07,-128.30) (  -0.54,-131.12)  320.95                80
 05/14/2020   21:49:29   (   0.08,-128.30) (   0.49,-126.59)  195.45                80
 05/16/2020   10:13:55   (  -0.06,-128.31) (   0.76,-131.84)  403.53                80
 05/17/2020   09:52:31   (  -0.07,-128.30) (  -0.27,-127.32)  112.22                80
 05/18/2020   22:17:07   (   0.04,-128.29) (  -0.90,-132.62)  493.07                80
 05/19/2020   21:58:22   (   0.06,-128.29) (   0.08,-128.08)   23.12                80
 05/22/2020   10:01:25   (  -0.05,-128.28) (   0.08,-128.82)   61.08                80
 05/23/2020   09:40:00   (  -0.07,-128.27) (  -0.95,-124.29)  453.80                80
 05/24/2020   22:04:35   (   0.04,-128.24) (  -0.27,-129.58)  153.30                80
 05/25/2020   21:43:11   (   0.06,-128.23) (   0.77,-125.05)  361.64                80