FALMA waveform data format

Last updated: 2026/02/06

This page describes the format of FALMA waveform data recorded after October, 2018.

File name

Data files are always named in the following way (for example AKKL1548422986.bz2):

The first three characters indicate the site name
The fourth character is always L for FALMA waveform data (meaning LF)
The next 10 digits indicate the unix time of the start of the data (one file always contains the data of one full second at this unix time)
The remaining four characters are always .bz2 (compressed in bz2 format)

Data format

FALMA waveform data are stored in a very simple format.

One file only contains data points recorded in the one second stored in signed int16 (no other information), so the value of recorded data is always in the range of -2¹⁵ to 2¹⁵.
Waveform data are recorded with a sampling rate of 1 MS/s, so each file contains 10⁶ data points in signed int16.
All data are compressed in the bz2 format. If a file is decompressed, the size is always exactly 2*10⁶ bytes (any other size indicates the file is corrupted).

With Python(3), waveform data can be read with the following code (no need to decompress):

import bz2
import numpy as np

fileName = 'AKKL1548422986.bz2'
fid = bz2.BZ2File(fileName)
dataMat = np.frombuffer(fid.read(), np.int16) 
fid.close()
#The length of dataMat is always 1,000,000

import bz2
import numpy as np

fileName = 'AKKL1548422986.bz2'
fid = bz2.BZ2File(fileName)
dataMat = np.frombuffer(fid.read(), np.int16) 
fid.close()
#The length of dataMat is always 1,000,000

Sign convention

Waveforms are recorded in the atmospheric electricity sign convention, so a negative return stroke produces an initial positive electric field change.

Site information

Locations of FALMA sites

Site	Latitude	Longitude	Altitude (m)
AKK	36.42482	136.42265	13
FTK	37.14248	136.69226	36
GFU	35.46457	136.73837	44
HIM	36.85695	136.97300	17
HKI	36.89355	136.77910	46
IBG	35.63635	136.48457	230
IMZ	36.73055	137.07560	45
KCC	34.67893	135.06747	150
KGM	36.51780	136.74288	423
KRB	36.87167	137.44750	20
KSM	35.71548	137.37070	555
KTJ	36.77802	137.12337	13
KZK	36.60805	136.59400	15
MIN	36.66652	136.66523	6
NAT	36.55283	136.95498	120
NNO	37.04315	136.96698	31
NZN	36.95440	137.49817	15
SKI	36.16696	136.23157	39
SKU	34.99534	138.44796	83
SSK	36.44767	136.64967	659
SUM	36.66528	136.64515	15
TBT	36.66922	136.72872	23
TGU	35.70533	139.49056
TKO	36.70758	136.92370	42
TYM	36.75208	137.29710	12

(Not all sites are currently working)

FALMA sites in different periods

Continuous observation from 2021/11

siteMat   = [     'AKK',     'FTK',     'GFU',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKU',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 34.995340, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,138.447958,136.694300,139.490561]
altitude  = [        16,        45,        52,       246,       150,        13,         5,       130,        29,        15,        39,        83,         6,       100]

siteMat   = [     'AKK',     'FTK',     'GFU',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKU',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 34.995340, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,138.447958,136.694300,139.490561]
altitude  = [        16,        45,        52,       246,       150,        13,         5,       130,        29,        15,        39,        83,         6,       100]

~2026/02/02

siteMat   = [     'AKK',     'FTK',     'GFU',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,       246,       150,        13,         5,       130,        29,        15,        39,         6,       100]

siteMat   = [     'AKK',     'FTK',     'GFU',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,       246,       150,        13,         5,       130,        29,        15,        39,         6,       100]

~2025/03/27

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,        17,       246,       150,        13,         5,       130,        29,        15,        39,         6,       100]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KCC',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 34.678933, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,135.067467,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,        17,       246,       150,        13,         5,       130,        29,        15,        39,         6,       100]

~2024/10/10

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,        17,       246,       150,         5,       130,        29,        15,        39,         6,       100]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY',     'TGU']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283, 35.705328]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300,139.490561]
altitude  = [        16,        45,        52,        17,       246,       150,         5,       130,        29,        15,        39,         6,       100]

~2024/06/24

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,       150,         5,       130,        29,        15,        39,         6]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,       150,         5,       130,        29,        15,        39,         6]

~2024/06/14

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,       555,       150,         5,       130,        29,        15,        39,         6]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,       555,       150,         5,       130,        29,        15,        39,         6]

~2024/03/22

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,       150,         5,       130,        29,        15,        39,         6]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'KTJ',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.778017, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,137.123367,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,       150,         5,       130,        29,        15,        39,         6]

~2023/11/15

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        15,        39,         6]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'NZN',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.954400, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,137.498167,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        15,        39,         6]

~2023/11/01

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,         6]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SKY']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.685283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.694300]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,         6]

~2023/09/21

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,        15]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,        15]

~2023/01/18

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,        15,        12]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KRB',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 36.871667, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.447500,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,        20,       555,         5,       130,        29,        39,        15,        12]

~2022/11/28

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,       555,         5,       130,        29,        39,        15,        12]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SKI',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.166958, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,136.665233,136.954967,136.967033,136.231567,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,       555,         5,       130,        29,        39,        15,        12]

~2022/10/22

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,136.665233,136.954967,136.967033,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,       555,         5,       130,        29,        15,        12]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.484567,137.370700,136.665233,136.954967,136.967033,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,       246,       555,         5,       130,        29,        15,        12]

2021/11/01~2022/03/22

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'HKI',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 36.893567, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.779083,136.484567,137.370700,136.665233,136.954967,136.967033,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,        52,       246,       555,         5,       130,        29,        15,        12]

siteMat   = [     'AKK',     'FTK',     'GFU',     'HIM',     'HKI',     'IBG',     'KSM',     'MIN',     'NAT',     'NNO',     'SUM',     'TYM']
latitude  = [ 36.424783, 37.142467, 35.464550, 36.856983, 36.893567, 35.636417, 35.715483, 36.666500, 36.552917, 37.043183, 36.665283, 36.752083]
longitude = [136.422633,136.692267,136.738417,136.973000,136.779083,136.484567,137.370700,136.665233,136.954967,136.967033,136.645150,137.297100]
altitude  = [        16,        45,        52,        17,        52,       246,       555,         5,       130,        29,        15,        12]

Winter observations

2019/11~2020/03, 2020/11~2021/03

siteMat   = [     'AKK',     'FTK',    'HIM',    'HKI',      'KGM',    'KZK',      'MIN',      'NAT',      'NNO',     'RGJ',     'SSK',     'TYM']
latitude  = [  36.42482,  37.14248, 36.85695, 36.89355,    36.5178, 36.60805,  36.666517,  36.552833,   37.04315,  36.77813,  36.44767, 36.752083]
longitude = [ 136.42265, 136.69226,  136.973, 136.7791, 136.742883,  136.594, 136.665233, 136.954983, 136.966983, 136.80702, 136.64967,137.297100]
altitude  = [        13,        36,       17,       46,        423,       15,          6,        120,         31,       584,       659,         1]

siteMat   = [     'AKK',     'FTK',    'HIM',    'HKI',      'KGM',    'KZK',      'MIN',      'NAT',      'NNO',     'RGJ',     'SSK',     'TYM']
latitude  = [  36.42482,  37.14248, 36.85695, 36.89355,    36.5178, 36.60805,  36.666517,  36.552833,   37.04315,  36.77813,  36.44767, 36.752083]
longitude = [ 136.42265, 136.69226,  136.973, 136.7791, 136.742883,  136.594, 136.665233, 136.954983, 136.966983, 136.80702, 136.64967,137.297100]
altitude  = [        13,        36,       17,       46,        423,       15,          6,        120,         31,       584,       659,         1]

2018/11~2019/03

siteMat   = [     'AKK',     'FTK',    'HIM',    'HKI',    'IMZ',      'KGM',    'KZK',      'MIN',      'NAT',      'NNO',     'RGJ',     'SSK',      'TBT',     'TKO']
latitude  = [  36.42482,  37.14248, 36.85695, 36.89355, 36.73055,    36.5178, 36.60805,  36.666517,  36.552833,   37.04315,  36.77813,  36.44767,  36.669217, 36.707583]
longitude = [ 136.42265, 136.69226,  136.973, 136.7791, 137.0756, 136.742883,  136.594, 136.665233, 136.954983, 136.966983, 136.80702, 136.64967, 136.728717,  136.9237]
altitude  = [        13,        36,       17,       46,       45,        423,       15,          6,        120,         31,       584,       659,         23,        42]

siteMat   = [     'AKK',     'FTK',    'HIM',    'HKI',    'IMZ',      'KGM',    'KZK',      'MIN',      'NAT',      'NNO',     'RGJ',     'SSK',      'TBT',     'TKO']
latitude  = [  36.42482,  37.14248, 36.85695, 36.89355, 36.73055,    36.5178, 36.60805,  36.666517,  36.552833,   37.04315,  36.77813,  36.44767,  36.669217, 36.707583]
longitude = [ 136.42265, 136.69226,  136.973, 136.7791, 137.0756, 136.742883,  136.594, 136.665233, 136.954983, 136.966983, 136.80702, 136.64967, 136.728717,  136.9237]
altitude  = [        13,        36,       17,       46,       45,        423,       15,          6,        120,         31,       584,       659,         23,        42]

2017 summer

siteName  = [     'GFU',     'IBG',    'ITD',      'KSG',      'KSM',      'SRG',      'TMK',      'TOK',      'TYT',    'YKC',      'YOR',      'YOT']
latitude  = [ 35.464567, 35.636383, 35.70295,   35.27315,  35.715516,  35.620617,  35.475333,    35.2734,   35.01725, 35.02225,  35.254783,    35.4867]
longitude = [136.738367, 136.48465, 136.8037, 137.036483, 137.370733, 137.168267, 136.960283, 137.225317, 137.134533, 136.5606, 136.595933, 137.245183]

siteName  = [     'GFU',     'IBG',    'ITD',      'KSG',      'KSM',      'SRG',      'TMK',      'TOK',      'TYT',    'YKC',      'YOR',      'YOT']
latitude  = [ 35.464567, 35.636383, 35.70295,   35.27315,  35.715516,  35.620617,  35.475333,    35.2734,   35.01725, 35.02225,  35.254783,    35.4867]
longitude = [136.738367, 136.48465, 136.8037, 137.036483, 137.370733, 137.168267, 136.960283, 137.225317, 137.134533, 136.5606, 136.595933, 137.245183]