[SIS-413] Units.PSU should have a scale value of 1/1000

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.8
• Fix Version/s: 1.0
• Component/s: Utilities
• Assignee: Martin Desruisseaux
• Reporter: Martin Desruisseaux
• Created: 04/Apr/18 13:57
• Updated: 20/Oct/19 19:37
• Resolved: 19/Jul/18 14:47

Description

Sea Water Salinity was used to be measured in g/kg, with values sometime written with the "‰" symbol (e.g. "35‰"). In modern oceanography, this has been replaced by Practical Salinity Unit (PSU), with values written without symbol (e.g. "35"). Strictly speaking, PSU units are not convertible to g/kg. However the PSU scale is by design very close to the old scale. If someone nevertheless attempts a conversion between those two scales, we want it to be close to the identity operation. Currently, the conversion wrongly multiply or divide values by 1000.

Issue Links

• depends upon: SIS-414 Multiplication symbol should be omitted when the unit is Units.UNITY
• is depended upon by: SIS-378 Too aggressive simplification of some units of measurement
• is depended upon by: SIS-146 Shortcomings in (un)marshalling of units of measurement
• relates to: SIS-128 Implement the JSR-363 javax.measure interfaces