Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 9.  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)
 03/11/2023   15:18:37   ( -70.10, 126.59) 03/11/2023   15:19:05  ( -70.09, 126.65)    2.38                28
 03/11/2023   16:09:21   (  69.98, -65.93) 03/11/2023   16:08:32  (  69.98, -65.86)    2.87                49
 03/14/2023   06:44:48   (  70.18,  74.91) 03/14/2023   06:45:59  (  70.18,  75.03)    4.73                71
 03/14/2023   07:35:29   ( -70.04,-117.55) 03/14/2023   07:35:30  ( -70.01,-117.57)    3.13                 1
 03/14/2023   08:26:11   (  69.82,  50.08) 03/14/2023   08:24:58  (  69.84,  49.84)    9.55                73
 03/16/2023   23:01:39   (  70.10,-169.18) 03/16/2023   23:02:23  (  70.09,-169.19)    1.19                44
 03/16/2023   23:52:21   ( -70.00,  -1.72) 03/16/2023   23:51:53  ( -69.98,  -1.71)    2.66                28
 03/19/2023   14:27:58   ( -70.82, 138.14) 03/19/2023   14:29:07  ( -70.71, 139.99)   68.68                69
 03/19/2023   15:18:29   (  70.03, -53.31) 03/19/2023   15:18:44  (  70.05, -53.34)    1.67                15
 03/19/2023   16:09:11   ( -69.94, 114.16) 03/19/2023   16:08:14  ( -69.94, 114.14)    0.59                57
 03/22/2023   06:44:36   ( -70.10,-104.94) 03/22/2023   06:45:38  ( -70.12,-104.97)    3.09                62
 03/22/2023   07:35:20   (  70.00,  62.52) 03/22/2023   07:35:05  (  70.00,  62.51)    0.71                15
 03/22/2023   08:25:53   ( -69.42,-129.31) 03/22/2023   08:24:43  ( -69.45,-130.61)   50.81                70