European Helio- and Asteroseismology Network (HELAS)

    Local Helioseismology Network Activity








    MDI AR8558 & Quiet Sun

    A nice dataset for quiet sun - AR comparison study. There is only high resolution data for Dopplergram data. Magnetograms and Intensity continnum are full disk and cover a longer period of time. Details of the active regions evolution are provided below, but are not essential for analysis of 35 hours data.

    Active Region map.

    Time: 35 hours of data, 1999.05.31_20:59:58 - 1999.06.02_07:58:58 UT

    Resolution: 0.068000 deg / pixel

    Dimensions: 256 x 512 x 2100 pixels

    Ephemeris:

    soho_ephemeris returned status 0 for 1999.06.02_02:59:30.000_TAI :
OBS_DIST (au) L0 (deg)  B0 (deg) VR (m/s) VN (m/s)  VW (m/s) Carr Rot
1.0031718621   299.197  -0.6045   325.74  3707.73   29028.3  1950.1689

    Date Lat Lon Area
    990527 N16 E75 50
    990528 N15 E61 60
    990529 N17 E49 50
    990530 N17 E35 50
    990531 N16 E22 50
    990601 N17 E08 40
    990602 N17 W06 40
    990603 N16 W18 40
    990604 N16 W30 30
    990605 N15 W44 20
    990606 N16 W57 10
    MDI sample header.

    Site Map

    This website is best viewed using Firefox, Safari or Internet Explorer browsers.