Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  METOP-B Lat/Lon    Distance(km)  Time Diff(sec)
 09/21/2021   05:45:43   (   0.29,-127.89) (   1.29,-123.56)  494.09                80
 09/22/2021   18:01:54   (  -0.32,-127.81) (  -0.28,-128.12)   35.23                80
 09/25/2021   06:02:55   (   0.33,-127.76) (   0.34,-127.72)    5.52                80
 09/27/2021   18:01:06   (  -0.33,-127.63) (  -0.39,-127.27)   40.94                80
 09/29/2021   06:17:27   (   0.34,-127.61) (  -0.60,-131.87)  485.25                80
 09/30/2021   05:59:27   (   0.33,-127.57) (   0.46,-126.86)   79.89                80
 10/01/2021   18:15:38   (  -0.34,-127.46) (   0.55,-131.42)  451.59                80
 10/02/2021   17:57:39   (  -0.33,-127.42) (  -0.56,-126.43)  113.27                80
 10/04/2021   06:13:59   (   0.35,-127.40) (  -0.47,-131.02)  413.46                80