Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 21.  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)
 03/22/2023   06:44:51   ( -70.74,-105.97) 03/22/2023   06:46:00  ( -70.61,-104.38)   59.94                69
 03/22/2023   07:35:24   (  70.05,  62.43) 03/22/2023   07:35:35  (  70.07,  62.47)    2.87                11
 03/22/2023   08:26:06   ( -69.96,-130.12) 03/22/2023   08:25:05  ( -69.96,-130.05)    2.50                61
 03/24/2023   23:01:32   ( -70.14,  10.76) 03/24/2023   23:02:36  ( -70.11,  10.76)    3.39                64
 03/24/2023   23:52:16   (  70.03, 178.24) 03/24/2023   23:52:03  (  70.00, 178.26)    3.04                13
 03/25/2023   00:42:50   ( -69.51, -13.68) 03/25/2023   00:41:39  ( -69.56, -14.72)   40.56                71
 03/27/2023   15:18:22   ( -70.07, 126.64) 03/27/2023   15:19:02  ( -70.06, 126.58)    2.59                40
 03/27/2023   16:09:06   (  69.96, -65.88) 03/27/2023   16:08:29  (  69.95, -65.93)    2.27                37
 03/30/2023   06:44:41   (  70.64,  74.21) 03/30/2023   06:45:51  (  70.53,  75.51)   49.64                70
 03/30/2023   07:35:13   ( -70.02,-117.49) 03/30/2023   07:35:28  ( -70.03,-117.57)    3.33                15
 03/30/2023   08:25:57   (  69.91,  49.97) 03/30/2023   08:24:55  (  69.92,  49.92)    2.33                62
 04/01/2023   23:01:23   (  70.12,-169.19) 04/01/2023   23:02:23  (  70.13,-169.17)    1.32                60
 04/01/2023   23:52:05   ( -70.03,  -1.73) 04/01/2023   23:51:53  ( -70.03,  -1.69)    1.59                12
 04/02/2023   00:42:38   (  69.34, 166.59) 04/02/2023   00:41:29  (  69.41, 165.12)   58.17                69
 04/04/2023   15:18:14   (  70.09, -53.37) 04/04/2023   15:18:48  (  70.09, -53.34)    1.24                34
 04/04/2023   16:08:56   ( -69.99, 114.10) 04/04/2023   16:08:18  ( -69.98, 114.15)    1.99                38