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Mirai MR21-03 Special Sonde (High Altitude Radiosonde)
  during the YMC-BSM 2021 campaign

  revised                                                  16 Mar. 2023
  drafted                                                  08 July 2022
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1. Summary

This is an archive of high altitude radiosonde data obtained during the 
R/V Mirai MR21-03 cruise aiming at measuring the temperature and the winds 
up to 40 km by using large balloons (3,000 or 4,000 g balloon). 
The sensor used is Meisei iMS-100.


2. Spatial Type

Vertical profile


3. Frequency

27 times


4. Temporal coverage

From	2021-05-27
To	2021-07-05 


5. Spatial coverage	

Maximum (North) Latitude	 29.45N
Minimum (South) Latitude	 01.30N
Maximum (East) Longitude	155.55E
Minimum (West) Longitude	136.49E


6. Files

    R[1|2]/F[YYYY][MM][DD][HH]S[NNNNNNN].CSV

        R[1|2]: Receiver number. 
           We used three receivers (R1, R2, and R3) for the special radio soundings.
           All are the same type of Meisei RD08AC system.
	   The receiver R1 was used in all the high altitude radiosonde observations. 
           Depending on the situation, the receiver R2 was also used simultaneously 
           as a backup in some soundings. The data obtained by merging the R1 and R2 
           soundings are also available (see Readme_SpecialSonde_HighAltitudeRadiosonde_merged.txt).

        [YYYY][MM][DD][HH]: Launch date and time

        [NNNNNNN]: Serial number of radiosonde.


7. Remarks.

If you have questions on this dataset, contact ymc-joffice@jamstec.go.jp.