Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2023 7 1.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 07/02/2023   23:26:03   ( -70.06,   4.56) 07/02/2023   23:26:53  ( -70.08,   4.63)    3.00                50
 07/03/2023   00:16:46   (  69.90, 172.11) 07/03/2023   00:16:21  (  69.92, 172.05)    3.22                25
 07/03/2023   01:07:12   ( -68.96, -19.22) 07/03/2023   01:06:05  ( -69.04, -21.50)   91.29                67
 07/05/2023   15:42:56   ( -70.03, 120.38) 07/05/2023   15:43:25  ( -70.02, 120.42)    2.01                29
 07/05/2023   16:33:40   (  69.92, -72.15) 07/05/2023   16:32:52  (  69.91, -72.09)    2.82                48
 07/08/2023   07:09:12   (  70.37,  68.32) 07/08/2023   07:10:23  (  70.26,  69.01)   28.64                71
 07/08/2023   07:59:49   ( -70.00,-123.80) 07/08/2023   07:59:56  ( -69.99,-123.74)    2.61                 7
 07/08/2023   08:50:32   (  69.85,  43.74) 07/08/2023   08:49:24  (  69.83,  43.68)    3.42                68
 07/10/2023   23:25:59   (  70.03,-175.39) 07/10/2023   23:26:57  (  70.05,-175.41)    1.88                58
 07/11/2023   00:16:41   ( -69.93,  -7.91) 07/11/2023   00:16:27  ( -69.95,  -7.92)    2.01                14
 07/11/2023   01:07:13   (  69.19, 160.46) 07/11/2023   01:06:04  (  69.28, 158.82)   65.68                69
 07/13/2023   15:42:51   (  70.02, -59.60) 07/13/2023   15:43:26  (  70.04, -59.55)    2.61                35
 07/13/2023   16:33:33   ( -69.91, 107.88) 07/13/2023   16:32:57  ( -69.88, 107.87)    3.44                36