Name Template: PUB/MISSION/level3/mmcGrd/mmcGrd_YYYY.DDD.AAA_SSSS.VVVV_nc
| AAA | Duration (days) |
| DDD | Starting day of year |
| MISSION | Mission ID (eight characters or less--champ, champrt, sacc, sacctst, etc) |
| PUB | Base directory for the pub hierarchy |
| SSSS | Subtype (an ID which tells the command options used in generating this file) |
| VVVV | Version (an ID which tells the version of all codes using in generating thie file) |
| YYYY | Starting year |
A grid of averaged radio occultation data, an MMC grid, where MMC means Monthly Mean Climatology.
This file is in netCDF format (see )
https://www.unidata.ucar.edu/software/netcdf/) and contains one month
of RO data binned into 5 degree latitude bins.
This data format was created by the RO trends study group, a group of radio occultation processing centers
that have been working together to understand the benefits and limitations of different methods of processing
RO data. For more details, see:
Ho, S.-P., G. Kirchengast, S. Leroy, J. Wickert, A. J. Mannucci, A. K. Steiner, D. Hunt, W. Schreiner, S. Sokolovskiy,
C. O. Ao, M. Borsche, A. von Engeln, U. Foelsche, S. Heise, B. Iijima, Y.-H. Kuo, R. Kursinski, B. Pirscher,
M. Ringer, C. Rocken, and T. Schmidt (2009),
Estimating the uncertainty of using GPS RO data for climate monitoring:
Inter-comparison of CHAMP refractivity climate records 2002-2006 from different data centers,
J. Geophys. Res., 114, D23107, doi:10.1029/2009JD011969.
Profile Data
lon
- Description:Longitude of the center point of the bin
- Data Type: float
- Units: degrees_east
- Valid Range: -180, 180
- Missing Value: 999999
lat
- Description:Latitude of the center point of the bin
- Data Type: float
- Units: degrees_north
- Valid Range: -90, 90
- Missing Value: 999999
altitude
- Description:Altitude Levels: Mean sea level altitude for refractivity, dry temperature and dry pressure, Impact altitude for bending angle, Pressure altitude geopotential
- Data Type: float
- Units: meters
- Valid Range: 200, 40000
- Missing Value: 999999
time
- Description:time
- Data Type: float
- Units: julian date
- Valid Range: -180, 180
- Missing Value: 999999
refractivity
- Description:Refractivity
- Data Type: float
- Units: N-units
- Valid Range: 0, 500
- Missing Value: 999999
N_refractivity
- Description:Number of averaged refractivity values
- Data Type: short (two byte) integer
- Units: unitless
- Missing Value: -1
dry_temperature
- Description:Dry Temperature
- Data Type: float
- Units: K
- Missing Value: 999999
N_dry_temperature
- Description:Number of averaged dry temperature values
- Data Type: short (two byte) integer
- Units: unitless
- Missing Value: -1
dry_pressure
- Description:Dry Pressure
- Data Type: float
- Units: hPa
- Missing Value: 999999
N_dry_pressure
- Description:Number of averaged dry pressure values
- Data Type: short (two byte) integer
- Units: unitless
- Missing Value: -1
bending_angle
- Description:Bending angle
- Data Type: float
- Units: radians
- Missing Value: 999999
N_bending_angle
- Description:Number of averaged bending angle values
- Data Type: short (two byte) integer
- Units: unitless
- Missing Value: -1
geopotential
- Description:Geopotential height
- Data Type: float
- Units: meters
- Missing Value: 999999
N_geopotential
- Description:Number of averaged geopotential height values
- Data Type: short (two byte) integer
- Units: unitless
- Missing Value: -1
|
