Simultaneous Nadir Overpasses (SNOs) between GOES-15 and METOP-B
TLE Epoch: 2021 9 16.  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)
 09/16/2021   05:49:09   (   0.27,-128.04) (   1.07,-124.39)  415.83                80
 09/17/2021   18:05:21   (  -0.30,-127.96) (  -0.05,-128.95)  113.99                80
 09/18/2021   17:47:21   (  -0.28,-127.93) (  -1.16,-123.95)  452.70                80
 09/20/2021   06:03:43   (   0.31,-127.93) (   0.17,-128.56)   71.14                80
 09/21/2021   05:45:43   (   0.29,-127.90) (   1.28,-123.56)  495.28                80
 09/22/2021   18:01:54   (  -0.32,-127.81) (  -0.27,-128.12)   34.77                80
 09/25/2021   06:02:55   (   0.33,-127.78) (   0.33,-127.72)    7.70                80
 09/27/2021   18:01:07   (  -0.33,-127.65) (  -0.43,-127.28)   42.35                80
 09/29/2021   06:17:27   (   0.34,-127.64) (  -0.61,-131.87)  482.25                80