Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 2 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NPP Lat/Lon    Distance(km)  Time Diff(sec)
 02/28/2021   10:13:51   (  -0.16,-128.20) (   0.68,-131.88)  418.60                80
 03/01/2021   09:52:26   (  -0.16,-128.22) (  -0.36,-127.35)   99.65                80
 03/02/2021   22:14:23   (   0.15,-128.28) (  -0.81,-132.65)  497.70                80
 03/03/2021   21:58:18   (   0.16,-128.30) (   0.22,-128.13)   21.00                80
 03/06/2021   10:01:20   (  -0.15,-128.31) (  -0.00,-128.85)   62.49                80
 03/07/2021   09:39:56   (  -0.15,-128.32) (  -1.04,-124.32)  454.90                80
 03/08/2021   22:01:52   (   0.14,-128.36) (  -0.12,-129.63)  144.10                80
 03/09/2021   21:45:46   (   0.14,-128.38) (   0.85,-125.09)  373.74                80
 03/11/2021   10:07:34   (  -0.12,-128.37) (   0.34,-130.36)  227.29                80
 03/12/2021   09:46:09   (  -0.13,-128.37) (  -0.69,-125.83)  289.86                80
 03/13/2021   22:08:06   (   0.12,-128.41) (  -0.47,-131.14)  310.25                80