Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 14.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-9) LANDSAT-9 Lat/Lon    Distance(km)  Time Diff(sec)
 03/14/2023   06:44:55   (  70.50,  74.40) 03/14/2023   06:46:06  (  70.40,  75.30)   35.71                71
 03/14/2023   07:35:30   ( -70.05,-117.57) 03/14/2023   07:35:40  ( -70.07,-117.54)    2.33                10
 03/14/2023   08:26:14   (  69.93,  49.91) 03/14/2023   08:25:08  (  69.90,  49.88)    3.30                66
 03/16/2023   23:01:40   (  70.13,-169.24) 03/16/2023   23:02:39  (  70.11,-169.23)    2.23                59
 03/16/2023   23:52:21   ( -69.99,  -1.70) 03/16/2023   23:52:09  ( -70.00,  -1.75)    2.69                12
 03/17/2023   00:42:55   (  69.34, 166.55) 03/17/2023   00:41:45  (  69.40, 165.06)   58.48                70
 03/19/2023   15:18:32   (  70.09, -53.40) 03/19/2023   15:19:07  (  70.10, -53.36)    2.32                35
 03/19/2023   16:09:14   ( -69.99, 114.06) 03/19/2023   16:08:37  ( -70.00, 114.12)    2.34                37
 03/22/2023   06:44:51   ( -70.74,-105.96) 03/22/2023   06:46:00  ( -70.60,-104.40)   59.61                69
 03/22/2023   07:35:24   (  70.06,  62.42) 03/22/2023   07:35:35  (  70.05,  62.44)    1.53                11
 03/22/2023   08:26:06   ( -69.96,-130.12) 03/22/2023   08:25:05  ( -69.94,-130.07)    2.67                61
 03/24/2023   23:01:31   ( -70.10,  10.83) 03/24/2023   23:02:35  ( -70.11,  10.78)    2.78                64
 03/24/2023   23:52:15   (  69.99, 178.30) 03/24/2023   23:52:02  (  70.00, 178.26)    1.53                13
 03/25/2023   00:42:49   ( -69.47, -13.62) 03/25/2023   00:41:38  ( -69.56, -14.71)   43.54                71
 03/27/2023   15:18:22   ( -70.10, 126.61) 03/27/2023   15:19:00  ( -70.07, 126.60)    3.29                38
 03/27/2023   16:09:05   (  69.95, -65.85) 03/27/2023   16:08:27  (  69.95, -65.92)    2.56                38