Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 11.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/11/2020   21:52:10   (   0.34,-128.38) (   0.70,-126.65)  196.77                80
 03/13/2020   10:13:59   (  -0.33,-128.33) (   0.46,-131.92)  408.82                80
 03/14/2020   09:52:34   (  -0.33,-128.32) (  -0.55,-127.39)  105.73                80
 03/15/2020   22:14:31   (   0.32,-128.32) (  -0.66,-132.69)  498.41                80
 03/16/2020   21:58:26   (   0.32,-128.31) (   0.35,-128.16)   16.18                80
 03/19/2020   10:01:29   (  -0.31,-128.23) (  -0.14,-128.89)   75.55                80
 03/20/2020   09:40:05   (  -0.31,-128.21) (  -1.15,-124.36)  438.49                80
 03/21/2020   22:04:41   (   0.30,-128.21) (  -0.06,-129.66)  166.40                80
 03/22/2020   21:45:57   (   0.30,-128.19) (   1.02,-125.15)  347.88                80
 03/24/2020   10:07:45   (  -0.29,-128.14) (   0.20,-130.41)  258.05                80
 03/25/2020   09:46:20   (  -0.30,-128.12) (  -0.81,-125.88)  255.59                80