== HMI Pipeline Module - PolarFieldExtrapolation ==
Extrapolate polar field from past observation and/or low latitude data to fill in the missing data at the polar region of a synoptic map. The output is a complete synoptic map.

===== Module Inputs =====
 . Synoptic maps with possible missing data at poles.
===== Module Outputs =====
 . Synoptic maps with extrapolated polar field.
===== Cadence =====
 . Monthly
===== Archive =====
 . Yes
===== Options =====
 . Indicate if there are any options when running the code
===== Overall Status of Module =====
 . 20%
===== Status of Code =====
 . A temporal extrapolation code exists in IDL.
===== Status of DRMS module =====
 . Indicate status of DRMS module version of module
===== Issues needing resolution =====
 * MDI temporal extrapolation scheme does not apply as no HMI polar observations are available at the beginning of the mission. Need cross calibration for the possible use of MDI polar data for estimation or perhaps develop a new method.
===== Responsible scientist =====
 . X. Sun
===== Remarks =====
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