Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2020 3 9.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/10/2020   22:08:15   (   0.33,-128.39) (  -0.30,-131.18)  318.63                80
 03/11/2020   21:52:11   (   0.34,-128.38) (   0.71,-126.65)  196.57                80
 03/13/2020   10:13:59   (  -0.33,-128.34) (   0.46,-131.93)  408.55                80
 03/14/2020   09:52:34   (  -0.33,-128.32) (  -0.55,-127.39)  106.00                80
 03/15/2020   22:14:31   (   0.32,-128.32) (  -0.66,-132.69)  498.60                80
 03/16/2020   21:58:26   (   0.32,-128.30) (   0.35,-128.16)   15.97                80
 03/19/2020   10:01:29   (  -0.31,-128.24) (  -0.14,-128.89)   75.30                80
 03/20/2020   09:40:05   (  -0.31,-128.22) (  -1.16,-124.36)  438.74                80
 03/21/2020   22:04:41   (   0.30,-128.21) (  -0.05,-129.66)  166.59                80
 03/22/2020   21:45:56   (   0.30,-128.19) (   0.96,-125.13)  347.66                80