Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 3 25.  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)
 03/27/2023   15:18:22   ( -70.07, 126.65) 03/27/2023   15:19:01  ( -70.08, 126.61)    2.16                39
 03/27/2023   16:09:06   (  69.95, -65.87) 03/27/2023   16:08:28  (  69.97, -65.89)    2.24                38
 03/30/2023   06:44:40   (  70.59,  74.29) 03/30/2023   06:45:50  (  70.49,  75.47)   45.03                70
 03/30/2023   07:35:13   ( -70.03,-117.51) 03/30/2023   07:35:26  ( -70.05,-117.54)    2.77                13
 03/30/2023   08:25:57   (  69.92,  49.97) 03/30/2023   08:24:53  (  69.94,  49.95)    2.33                64
 04/01/2023   23:01:21   (  70.10,-169.15) 04/01/2023   23:02:19  (  70.13,-169.16)    3.31                58
 04/01/2023   23:52:03   ( -70.00,  -1.69) 04/01/2023   23:51:49  ( -70.02,  -1.69)    1.61                14
 04/02/2023   00:42:35   (  69.26, 166.70) 04/02/2023   00:41:26  (  69.35, 165.05)   65.78                69
 04/04/2023   15:18:12   (  70.09, -53.36) 04/04/2023   15:18:42  (  70.09, -53.31)    2.05                30
 04/04/2023   16:08:54   ( -70.00, 114.10) 04/04/2023   16:08:12  ( -69.99, 114.17)    2.94                42
 04/07/2023   06:44:23   ( -70.42,-105.39) 04/07/2023   06:45:35  ( -70.29,-104.77)   27.11                72
 04/07/2023   07:35:02   (  70.05,  62.48) 04/07/2023   07:35:04  (  70.06,  62.55)    2.72                 2
 04/07/2023   08:25:43   ( -69.90,-129.97) 04/07/2023   08:24:35  ( -69.90,-130.04)    2.76                68