Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2019 3 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 03/06/2019   10:06:53   (   0.00,-128.40) (   0.47,-130.37)  224.72                18
 03/07/2019   09:46:31   (  -0.00,-128.41) (  -0.59,-125.85)  292.18                80
 03/08/2019   22:11:06   (   0.00,-128.36) (  -0.62,-131.14)  316.98                80
 03/09/2019   21:49:41   (   0.00,-128.36) (   0.38,-126.61)  199.53                80
 03/11/2019   10:11:28   (  -0.00,-128.40) (   0.77,-131.88)  395.84                80
 03/12/2019   09:55:23   (  -0.00,-128.40) (  -0.22,-127.34)  120.33                80
 03/13/2019   22:17:18   (  -0.00,-128.34) (  -0.98,-132.64)  490.00                80
 03/14/2019   21:55:53   (  -0.00,-128.33) (   0.08,-128.11)   25.72                80
 03/17/2019   09:58:54   (   0.00,-128.35) (   0.13,-128.84)   56.33                80
 03/18/2019   09:42:50   (   0.00,-128.33) (  -0.92,-124.31)  458.91                80
 03/19/2019   22:04:45   (  -0.00,-128.27) (  -0.28,-129.61)  152.58                80