Description of Data

---Yearly Mean---

File name: mtkannual.txt
Format: Plain text

Contents
Year: Year for an observation.
Obs.Days: Days of observations in a year.
R: Yearly mean of Sunspot relative number (#1)
North: Northern hemisphare in the Sun
South: Southern hemisphare in the Sun
Total: Whole disk of the Sun

Charactor position in a row and data types
-[2-5](i4): Year 
-[9-11](i3): Obs.Days 
-[18-23](f6.2): R North 
-[26-31](f6.2): R South 
-[34-39](f6.2): R Total 


---Monthly Mean---

File name: mtkmonthly.txt
Format: Plain text

Contents
Year: Year for an observation.
Month: Month for an observation.
Obs.Days: Days of observations in a month.
R (raw): Monthly mean of sunspot relative number 
R (smoothed): 13-months running mean of sunspot relative number (#2)
North: Northern hemisphare in the Sun
South: Southern hemisphare in the Sun
Total: Whole disk of the Sun
k: Correction factor for the sunspot relative bumber

Charactor position in a row and data types
-[2-5](i4): Year 
-[9-10] (i2): Month
-[18-19](i2): Obs.Days 
-[25-30](f6.2): R (raw) North 
-[33-38](f6.2): R (raw) South 
-[41-46](f6.2): R (raw) Total 
-[51-56](f6.2): R (smoothed) North 
-[59-64](f6.2): R (smoothed) South 
-[67-72](f6.2): R (smoothed) Total 
-[78-81](f4.2): k


---Daily Observational Data for Each Year---

File name: mtkdailyYYYY.txt (YYYY is 4-digit integer for year)
Format: Plain text

k: Correction factor for the sunspot relative bumber
Date: Day for an observation
Time (UT): Time for an observation (in Universal Time)
h: Hour
m: Minute
North: Northern hemisphare in the Sun
South: Southern hemisphare in the Sun
Total: Whole disk of the Sun
g: Number of sunspot groups
f: Number of individual sunspots
R: Sunspot Relative Number

Charactor position in a row and data types
-[2-3](i2): Date 
-[6-7] (i2): Time (UT) h
-[9-10](i2): Time (UT) m 
-[15-17](i3): North g 
-[20-22](i3): North f
-[25-30](f6.2): North R 
-[35-37](i3): South g 
-[40-42](i3): South f
-[45-50](f6.2): South R 
-[57-59](i3): Total g 
-[62-64](i3): Total f
-[67-72](f6.2): Total R 

-[25-30](f6.2): Monthly Mean North R
-[45-50](f6.2): Monthly Mean South R 
-[67-72](f6.2): Monthly Mean Total R 

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(#1) Sunspot Relative Number: An index of the solar activity introduced by R. Wolf. A sunspot relatibe number R is derived from;
R = k(10g + f),
where, g is a number of sunspot groups, f is a number of indivisual sunspots and k is the correction factor.

(#2) 13-months running mean of sunspot relative number: 13-months running mean in the nth month Rs(n) is calculated as;
Rs(n) = [(0.5(Rn-6)) + R(n-5) + ... + R(n-1) + R(n) + R(n+1) + ... + R(n+5) + (0.5(n+6))]/12,
where, R(n) is a monthly mean in the nth month and R(n-6), ... , R(n-1), R(n+1), ... , R(n+6) are monthly mean values for the six months before and after that month.
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