Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 29.  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)
 03/30/2023   06:44:41   (  70.64,  74.22) 03/30/2023   06:45:50  (  70.52,  75.50)   49.26                69
 03/30/2023   07:35:14   ( -70.08,-117.58) 03/30/2023   07:35:26  ( -70.07,-117.51)    2.76                12
 03/30/2023   08:25:57   (  69.91,  49.98) 03/30/2023   08:24:54  (  69.91,  49.91)    2.77                63
 04/01/2023   23:01:22   (  70.14,-169.21) 04/01/2023   23:02:20  (  70.11,-169.19)    2.54                58
 04/01/2023   23:52:03   ( -69.99,  -1.68) 04/01/2023   23:51:50  ( -70.00,  -1.72)    1.54                13
 04/02/2023   00:42:36   (  69.30, 166.65) 04/02/2023   00:41:27  (  69.34, 165.03)   63.79                69
 04/04/2023   15:18:12   (  70.07, -53.33) 04/04/2023   15:18:44  (  70.05, -53.38)    3.25                32
 04/04/2023   16:08:54   ( -69.98, 114.13) 04/04/2023   16:08:13  ( -69.99, 114.17)    2.01                41
 04/07/2023   06:44:24   ( -70.44,-105.43) 04/07/2023   06:45:36  ( -70.32,-104.74)   29.34                72
 04/07/2023   07:35:02   (  70.02,  62.53) 04/07/2023   07:35:06  (  70.04,  62.51)    2.35                 4
 04/07/2023   08:25:44   ( -69.93,-130.01) 04/07/2023   08:24:36  ( -69.93,-130.01)    0.27                68
 04/09/2023   23:01:08   ( -70.09,  10.90) 04/09/2023   23:02:01  ( -70.10,  10.86)    2.25                53
 04/09/2023   23:51:52   (  69.98, 178.37) 04/09/2023   23:51:28  (  69.98, 178.34)    1.21                24
 04/10/2023   00:42:19   ( -69.09, -13.03) 04/10/2023   00:41:11  ( -69.16, -15.14)   84.21                68
 04/12/2023   14:27:31   (  71.00, -42.09) 04/12/2023   14:28:37  (  70.92, -39.64)   89.45                66
 04/12/2023   15:17:57   ( -70.06, 126.73) 04/12/2023   15:18:21  ( -70.05, 126.70)    1.85                24
 04/12/2023   16:08:41   (  69.96, -65.81) 04/12/2023   16:07:47  (  69.98, -65.75)    3.52                54