Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-9
TLE Epoch: 2025 5 19.  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)
 05/19/2025   14:28:23   (  70.19, -40.91) 05/19/2025   14:29:03  (  70.20, -40.88)    1.05                40
 05/19/2025   15:19:04   ( -70.06, 126.61) 05/19/2025   15:18:33  ( -70.08, 126.58)    2.19                31
 05/22/2025   05:54:46   ( -70.85, -93.52) 05/22/2025   05:55:55  ( -70.73, -91.87)   61.97                69
 05/22/2025   06:45:19   (  70.15,  74.92) 05/22/2025   06:45:31  (  70.13,  74.91)    1.41                12
 05/22/2025   07:36:00   ( -70.02,-117.56) 05/22/2025   07:35:01  ( -70.02,-117.62)    2.34                59
 05/24/2025   22:11:31   ( -70.19,  23.31) 05/24/2025   22:12:32  ( -70.21,  23.25)    3.31                61
 05/24/2025   23:02:16   (  70.11,-169.26) 05/24/2025   23:01:59  (  70.11,-169.25)    0.46                17
 05/24/2025   23:52:47   ( -69.45,  -0.97) 05/24/2025   23:51:38  ( -69.50,  -2.46)   58.39                69
 05/27/2025   14:28:28   ( -70.16, 139.12) 05/27/2025   14:29:00  ( -70.16, 139.06)    2.07                32
 05/27/2025   15:19:13   (  70.08, -53.46) 05/27/2025   15:18:27  (  70.05, -53.44)    2.54                46
 05/30/2025   05:54:45   (  70.31,  87.31) 05/30/2025   05:55:56  (  70.31,  87.53)    8.07                71
 05/30/2025   06:45:25   ( -70.13,-105.09) 05/30/2025   06:45:27  ( -70.15,-105.08)    1.61                 2
 05/30/2025   07:36:08   (  69.95,  62.50) 05/30/2025   07:34:55  (  69.98,  62.34)    7.39                73
 06/01/2025   22:11:39   (  70.19,-156.74) 06/01/2025   22:12:23  (  70.22,-156.73)    2.69                44
 06/01/2025   23:02:21   ( -70.12,  10.70) 06/01/2025   23:01:53  ( -70.11,  10.75)    2.17                28