Simultaneous Nadir Overpasses (SNOs) between FY3D and METOP-A
TLE Epoch: 2021 1 26.  Predictions up to the next  14.0 days:

     Date     Time(FY3D) FY3D Lat/Lon Date Time(METOP-A) METOP-A Lat/Lon    Distance(km)  Time Diff(sec)
 01/26/2021   03:40:48   (  76.50, 108.58) 01/26/2021   03:40:07  (  76.51, 108.51)    2.04                41
 01/26/2021   04:31:31   ( -76.49, -84.06) 01/26/2021   04:30:49  ( -76.49, -84.21)    3.79                42
 01/26/2021   05:22:17   (  76.50,  83.21) 01/26/2021   05:21:29  (  76.49,  83.10)    2.99                48
 01/26/2021   06:13:00   ( -76.49,-109.43) 01/26/2021   06:12:10  ( -76.52,-109.45)    3.88                50
 01/26/2021   07:03:46   (  76.50,  57.84) 01/26/2021   07:02:50  (  76.51,  57.86)    1.89                56
 01/26/2021   07:54:28   ( -76.49,-134.81) 01/26/2021   07:53:31  ( -76.50,-134.86)    2.23                57
 01/26/2021   08:45:14   (  76.50,  32.46) 01/26/2021   08:44:11  (  76.49,  32.45)    0.56                63
 01/26/2021   09:35:57   ( -76.49,-160.18) 01/26/2021   09:34:53  ( -76.48,-160.27)    2.38                64
 01/26/2021   10:26:43   (  76.50,   7.09) 01/26/2021   10:25:33  (  76.48,   7.04)    2.83                70
 01/26/2021   11:17:26   ( -76.49, 174.45) 01/26/2021   11:16:14  ( -76.51, 174.49)    2.76                72
 01/26/2021   12:08:09   (  76.36, -17.78) 01/26/2021   12:06:57  (  76.36, -18.69)   23.96                72
 01/26/2021   12:58:52   ( -76.35, 149.58) 01/26/2021   12:57:39  ( -76.35, 148.60)   25.76                73
 01/26/2021   13:49:32   (  76.09, -42.18) 01/26/2021   13:48:25  (  76.07, -45.04)   76.62                67
 01/26/2021   14:40:14   ( -76.04, 125.33) 01/26/2021   14:39:08  ( -76.01, 122.10)   86.76                66