Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2023 5 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)
 05/30/2023   15:17:46   ( -70.12, 126.60) 05/30/2023   15:18:30  ( -70.10, 126.59)    2.61                44
 05/30/2023   16:08:30   (  69.99, -65.91) 05/30/2023   16:07:57  (  70.00, -65.91)    0.23                33
 06/02/2023   06:44:10   (  70.82,  73.94) 06/02/2023   06:45:18  (  70.74,  75.77)   67.54                68
 06/02/2023   07:34:40   ( -70.10,-117.61) 06/02/2023   07:34:58  ( -70.08,-117.57)    2.82                18
 06/02/2023   08:25:24   (  69.98,  49.89) 06/02/2023   08:24:25  (  69.97,  49.93)    1.79                59
 06/04/2023   23:00:52   (  70.12,-169.19) 06/04/2023   23:01:57  (  70.15,-169.23)    3.19                65
 06/04/2023   23:51:34   ( -70.03,  -1.74) 06/04/2023   23:51:27  ( -70.04,  -1.75)    0.78                 7
 06/05/2023   00:42:11   (  69.54, 166.30) 06/05/2023   00:41:00  (  69.60, 165.29)   39.56                71
 06/07/2023   15:17:47   (  70.12, -53.41) 06/07/2023   15:18:25  (  70.14, -53.36)    3.04                38
 06/07/2023   16:08:29   ( -70.02, 114.04) 06/07/2023   16:07:55  ( -70.03, 114.12)    3.08                34
 06/10/2023   06:44:09   ( -70.80,-106.05) 06/10/2023   06:45:18  ( -70.66,-104.37)   63.65                69
 06/10/2023   07:34:41   (  70.06,  62.43) 06/10/2023   07:34:54  (  70.05,  62.39)    1.99                13
 06/10/2023   08:25:23   ( -69.97,-130.10) 06/10/2023   08:24:24  ( -69.95,-130.12)    2.09                59