Simultaneous Nadir Overpasses (SNOs) between METOP-A and NPP
TLE Epoch: 2021 5 20.  Predictions up to the next  14.0 days:

     Date     Time(METOP-A) METOP-A Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 05/20/2021   18:43:17   ( -76.64,  60.30) 05/20/2021   18:43:36  ( -76.65,  60.19)    2.83                19
 05/20/2021   19:33:57   (  76.63,-132.40) 05/20/2021   19:34:21  (  76.62,-132.40)    1.26                24
 05/20/2021   20:24:39   ( -76.62,  34.89) 05/20/2021   20:25:05  ( -76.60,  34.98)    3.04                26
 05/20/2021   21:15:19   (  76.61,-157.81) 05/20/2021   21:15:51  (  76.62,-157.78)    1.40                32
 05/20/2021   22:06:01   ( -76.60,   9.48) 05/20/2021   22:06:35  ( -76.61,   9.60)    3.13                34
 05/20/2021   22:56:40   (  76.64, 176.94) 05/20/2021   22:57:21  (  76.62, 176.84)    3.11                41
 05/20/2021   23:47:22   ( -76.63, -15.77) 05/20/2021   23:48:05  ( -76.61, -15.78)    2.31                43
 05/21/2021   00:38:02   (  76.62, 151.53) 05/21/2021   00:38:51  (  76.63, 151.46)    2.08                49
 05/21/2021   01:28:44   ( -76.61, -41.18) 05/21/2021   01:29:35  ( -76.61, -41.17)    0.34                51
 05/21/2021   02:19:24   (  76.60, 126.12) 05/21/2021   02:20:21  (  76.63, 126.07)    3.38                57
 05/21/2021   03:10:06   ( -76.59, -66.59) 05/21/2021   03:11:05  ( -76.61, -66.55)    2.65                59
 05/21/2021   04:00:46   (  76.58, 100.71) 05/21/2021   04:01:50  (  76.59, 100.86)    3.98                64
 05/21/2021   04:51:27   ( -76.62, -91.84) 05/21/2021   04:52:35  ( -76.61, -91.93)    2.45                68
 05/21/2021   05:42:07   (  76.61,  75.46) 05/21/2021   05:43:20  (  76.59,  75.48)    2.16                73
 05/21/2021   06:32:50   ( -76.55,-117.41) 05/21/2021   06:34:04  ( -76.57,-117.14)    7.23                74
 05/21/2021   07:23:36   (  76.27,  48.92) 05/21/2021   07:24:44  (  76.32,  51.09)   57.58                68
 05/21/2021   08:14:19   ( -76.21,-143.94) 05/21/2021   08:15:27  ( -76.26,-141.37)   68.06                68