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Last modified: Tue Sep 2 18:17:29 2025.

# Directory Listing of Routines

# projects/erg/ground/vlf

- ERG_LOAD_ISEE_VLF
  To load VLF spectrum data obtained by ISEE ELF/VLF network from the ISEE ERG-SC site

# Routine Descriptions

## ERG_LOAD_ISEE_VLF

[List of Routines]

     PROCEDURE: ERG_LOAD_ISEE_VLF

     PURPOSE:
       To load VLF spectrum data obtained by ISEE ELF/VLF network from the ISEE ERG-SC site

     KEYWORDS:
       site  = Observatory name, example, erg_load_isee_vlf, site='ath',
               the default is 'all', i.e., load all available stations.
               This can be an array of strings, e.g., ['ath', 'kap']
               or a single string delimited by spaces, e.g., 'ath kap'.
               Available sites as of July, 2017 : ath, kap, gak, ist, mam
       downloadonly : if set, then only download the data, do not load it into variables.
       no_server : use only files which are online locally.
       no_download : use only files which are online locally. (Identical to no_server keyword.)
       trange : Time range of interest  (2 element array).
       timeclip :  if set, then data are time clipped.

       cal_gain : if set, frequency-dependent gain of the antenna system is calibrated.
                  The unit of gain G(f) is V/T, and calibrated spectral power P(f)
                  at frequecy f is computed as

                   P(f) = S(f)/ (G(f)^2) [nT^2/Hz],

                  where S(f) is uncaibrated spectral power in unit of V^2/Hz.

     EXAMPLE:
       erg_load_isee_vlf, site='ath', $
             trange=['2015-03-17/00:00:00','2015-03-17/02:00:00']

     NOTE: See the rules of the road.
           For more information, see http://stdb2.isee.nagoya-u.ac.jp/vlf/

     HISTORY:
            2016-02-21 : Initial release by Yoshi Miyoshi(ERG-Science Center, ISEE, Nagoya Univ.)
            2017-07-07 : Modified by Satoshi Kurita (ISEE, Nagoya Univ., kurita at isee.nagoya-u.ac.jp)
            2022-12-05 : Modified by Atsuki Shinbori (ISEE, Nagoya Univ., shinbori at isee.nagoya-u.ac.jp)

     $LastChangedDate: 2023-01-11 10:09:14 -0800 (Wed, 11 Jan 2023) $
     $LastChangedRevision: 31399 $

(See projects/erg/ground/vlf/erg_load_isee_vlf.pro)