Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 1 15.  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)
 01/17/2023   06:45:11   ( -70.19,-105.03) 01/17/2023   06:46:23  ( -70.18,-104.96)    2.81                72
 01/17/2023   07:35:55   (  70.07,  62.46) 01/17/2023   07:35:50  (  70.07,  62.53)    2.97                 5
 01/17/2023   08:26:34   ( -69.83,-129.86) 01/17/2023   08:25:22  ( -69.85,-130.14)   11.38                72
 01/19/2023   23:02:03   ( -70.14,  10.82) 01/19/2023   23:02:49  ( -70.12,  10.84)    2.40                46
 01/19/2023   23:52:47   (  70.03, 178.30) 01/19/2023   23:52:16  (  70.01, 178.33)    2.44                31
 01/22/2023   14:28:27   (  70.88, -41.91) 01/22/2023   14:29:34  (  70.78, -39.91)   73.76                67
 01/22/2023   15:18:56   ( -70.10, 126.64) 01/22/2023   15:19:15  ( -70.07, 126.67)    3.17                19
 01/22/2023   16:09:39   (  69.94, -65.80) 01/22/2023   16:08:42  (  69.96, -65.84)    2.81                57
 01/25/2023   06:45:07   (  70.17,  74.99) 01/25/2023   06:46:10  (  70.15,  75.05)    3.20                63
 01/25/2023   07:35:48   ( -70.02,-117.47) 01/25/2023   07:35:40  ( -70.05,-117.47)    2.70                 8
 01/25/2023   08:26:24   (  69.49,  50.63) 01/25/2023   08:25:14  (  69.54,  49.48)   44.95                70
 01/27/2023   23:01:59   (  70.11,-169.14) 01/27/2023   23:02:35  (  70.08,-169.15)    2.61                36
 01/27/2023   23:52:41   ( -70.01,  -1.67) 01/27/2023   23:52:05  ( -69.98,  -1.66)    3.08                36