Compute mean-variable field at a given date

It is very frequent nowadays that mean gravity fields include time-variable terms. This form allows you to compute the value of the CNES/GRGS mean fields at a given date, by summing the different variable terms:

• Value at reference date,
• DOT,
• annual COS and SIN,
• semi-annual COS and SIN,

Indicate the gravity model and day of interest

Gravity field model	EIGEN-GRGS.RL02.MEAN-FIELD (4.5 years of data) EIGEN-GRGS.RL02bis.MEAN-FIELD (8 years of data) EIGEN-6S2.extended.v2 (ITRF2014 standards) EIGEN-GRGS.RL03.MEAN-FIELD (10 years of GRACE data) EIGEN-GRGS.RL03-v2.MEAN-FIELD (12 years of GRACE data) EIGEN-GRGS.RL04.MEAN-FIELD (14 years of GRACE data, quadratic mean pole convention) EIGEN-GRGS.RL04.MEAN-FIELD (14 years of GRACE data, linear mean pole convention)
Date

The format of the date must be one of the following:

• Decimal years. Example: 2012 or 2009.50
• Julian day 1950. Example: 21512
• YYYYDOY. Example: 2011365
• YYYYMMDD. Example: 20111231