Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NPP
TLE Epoch: 2021 8 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)
 08/07/2021   10:12:03   (  -0.19,-128.08) (   0.68,-131.98)  444.80                80
 08/08/2021   09:55:59   (  -0.18,-128.10) (  -0.31,-127.45)   73.78                80
 08/10/2021   21:56:33   (   0.19,-128.05) (   0.16,-128.23)   20.61                80
 08/11/2021   21:40:28   (   0.18,-128.06) (   1.15,-123.69)  497.57                80
 08/13/2021   09:59:38   (  -0.20,-128.18) (  -0.01,-128.98)   90.80                80
 08/14/2021   09:43:34   (  -0.19,-128.19) (  -1.06,-124.45)  427.12                80
 08/15/2021   22:02:51   (   0.22,-128.12) (  -0.13,-129.76)  186.66                80
 08/16/2021   21:46:47   (   0.21,-128.12) (   0.86,-125.22)  330.52                80
 08/18/2021   10:05:56   (  -0.23,-128.22) (   0.27,-130.51)  259.75                80
 08/19/2021   09:49:52   (  -0.23,-128.23) (  -0.72,-125.97)  257.23                80