Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 5 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)
 05/16/2020   10:13:55   (  -0.05,-128.30) (   0.75,-131.84)  403.99                80
 05/17/2020   09:52:31   (  -0.07,-128.30) (  -0.28,-127.32)  111.63                80
 05/18/2020   22:17:06   (   0.04,-128.28) (  -0.95,-132.61)  493.60                80
 05/19/2020   21:58:22   (   0.06,-128.28) (   0.08,-128.08)   22.40                80
 05/22/2020   10:01:25   (  -0.05,-128.27) (   0.08,-128.82)   62.33                80
 05/23/2020   09:40:00   (  -0.06,-128.26) (  -0.95,-124.29)  452.40                80
 05/24/2020   22:04:36   (   0.04,-128.23) (  -0.27,-129.58)  154.66                80
 05/25/2020   21:43:11   (   0.05,-128.21) (   0.76,-125.05)  360.14                80
 05/27/2020   10:07:38   (  -0.03,-128.20) (   0.43,-130.32)  240.86                80
 05/28/2020   09:46:14   (  -0.04,-128.18) (  -0.60,-125.79)  273.15                80