Accessing data using CPT (ingrid imposes a limit of 3999 points in the degrees-east grid)

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$partialdiff sub Sh$ $integral dSh$ [ Hydromet Seasonal_Forecast Precipitation hindcast_date ]

Sh grid: /Sh (months since 1960-01-01) ordered (16 Dec 1980 - 15 Jan 1981) to (16 Nov 2010 - 15 Dec 2010) by 1.0 N= 360 pts :grid
Forecast Lead Time in Months grid: /L (months) ordered [ (2.5)] :grid

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CPTv10+