Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 30.  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)
 04/01/2023   23:01:22   (  70.09,-169.14) 04/01/2023   23:02:21  (  70.11,-169.19)    3.12                59
 04/01/2023   23:52:03   ( -70.00,  -1.69) 04/01/2023   23:51:50  ( -69.99,  -1.72)    1.50                13
 04/02/2023   00:42:36   (  69.30, 166.64) 04/02/2023   00:41:27  (  69.33, 165.02)   63.67                69
 04/04/2023   15:18:12   (  70.08, -53.34) 04/04/2023   15:18:43  (  70.10, -53.31)    2.44                31
 04/04/2023   16:08:54   ( -69.99, 114.11) 04/04/2023   16:08:13  ( -69.98, 114.16)    1.93                41
 04/07/2023   06:44:24   ( -70.45,-105.45) 04/07/2023   06:45:35  ( -70.37,-104.66)   30.69                71
 04/07/2023   07:35:02   (  70.03,  62.52) 04/07/2023   07:35:06  (  70.03,  62.50)    0.77                 4
 04/07/2023   08:25:44   ( -69.94,-130.03) 04/07/2023   08:24:36  ( -69.92,-130.02)    1.52                68
 04/09/2023   23:01:08   ( -70.10,  10.88) 04/09/2023   23:02:01  ( -70.09,  10.85)    1.43                53
 04/09/2023   23:51:52   (  70.00, 178.35) 04/09/2023   23:51:28  (  69.98, 178.33)    2.23                24
 04/10/2023   00:42:19   ( -69.11, -13.04) 04/10/2023   00:41:11  ( -69.15, -15.15)   83.58                68
 04/12/2023   14:27:32   (  71.02, -42.12) 04/12/2023   14:28:38  (  70.92, -39.65)   90.30                66
 04/12/2023   15:17:58   ( -70.08, 126.70) 04/12/2023   15:18:21  ( -70.10, 126.77)    3.32                23
 04/12/2023   16:08:40   (  69.92, -65.76) 04/12/2023   16:07:48  (  69.92, -65.83)    2.93                52