What Time is it Including secondsIncluding seconds.
Actual time in Albany, New York, USA
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ERDDDAP Conversion Time
At different places in ERDDAP a time can be displayed as such: The web site has converter that can convert character chain time value (with different formats) to/from numerical time value (with different unit strings). The ERDDAP program also has a converter to convert time and unit character chains that use other file types to those used by ERDDAP.
In order to prevent mix-ups between time area and summer time, the time data in ERDDAP always use the Zulu time area (UTC, GMT) marked 'Z'. Following converter accepts strings with different time zoning. Return the template to its defaults. Or you can circumvent this Web page and perform time convertions within a computer application, scripts, or Web page.
Exclusion of Exclusion of Liability -No individual or entity associated with this website gives any explicit or implicit guarantee, including guarantees of marketability and suitability for a particular use, or accepts any juridical responsibility for the correctness, exhaustiveness or usefulness of information on this website. This converter accepts a large number of character set time format, but there will always be format that it does not recognise or that it interprets differently than you do.
Sometimes there are two or more popular but different ways of interpreting a particular time format, in particular #/#/#/#: in the USA it is usually for month/date/year, while in most European countries it is for date/month/year. ERDDAP in this special case reads the value as month/date/year.
For example, "seconds since 01.01.1970-01T00:00:00:00Z". You can use the first words (upper or lower case): ms, sec, ms, msecs, ms, miliseconds, milliseconds, miliseconds, seconds, seconds, ms, mi, minutes, mins, seconds, minerals, minutes, hrs, hr, hours, hrs, d, day, dates, events, weeks, weekly, weekly, monthly, monthly, year, year, year or year.
Timeline can be in any arbitrary size. Percentage of time is voluntary. ERDDDAP will do its best to reread the file size you specify. wherein Z'Z' or hhh or hh:mm is a distance to the Zulu/GMT time area. The Zulu/GMT time zones are used if you leave out zero and zero.
In technical terms, ERDDAP does NOT comply with the UDUNITS standards when it converts "years since" and "months since" time in " seconds since". Three. 15569259747e7 seconds. Unfortunately, most/all records that we have seen that use "years since" or "months since" clearly state that the readings are either calendars or years.
ERDDAP therefore considers "years since" and "months since" as calendars and does not adhere rigidly to the UDUNITS standards. Accuracy converters - If you represent time as numbers, this converters always keeps the numbers in their full accuracy. In case timers are represented as strings, this convertor will format the timers to the (truncated) second (i.e. without milliseconds).
The time is a complicated, intricate and chaotic subject. Objective - A basic objective of the ERDDAP system for time management is a unique system that allows time information from each record to be directly matched with time information from any other record. Points of time - ERDDDAP will only deal with points of time (a combination of date and time in the Zulu time zones, one point of time each).
Timezones - When ERDDAP writes time readings, it always uses the Zulu time zones (UTC, GMT) and never uses summer time. Timing information from a single point of time zoning (which may include summer time information) is transformed into Zulu time. Timing information from a resource without time zoning information is accepted as already in Zulu time.
Accuracy - ERDDDAP treats the time as " seconds since 1970-00-00T00:00:00:00Z" internal, disregarding leak seconds saved as floats with twice the accuracy. Thus most time dates can be saved very accurately (e.g. to the next minute, but less and less accurately very far in the past or future). ERDDAP often works to the milli-second for computations to prevent issues with more or less than expected decimal numbers.
ERDDAP always keeps the numbers with full accuracy when displaying time as numbers. ERDDAP defaults to format time to the (truncated) second (i.e. without milliseconds) when displaying time as a character chain. ERDDAP admins can however set certain tags in certain records to display character strings in other accuracies (e.g. from milli-second to monthly accuracy; see tag ).
If a time frame (e.g. miliseconds or seconds) is not displayed, the missing value is taken as 0 (except for the date of the week, which is taken as 1). Uniform Unit - Using the same unit for time ("seconds since 1970-00-00T00:00:00:00Z") for all records allows easy comparison of time from different records.
Second is the basic measure of time of the International System of units (SI). 1970-01-01T00:00:00:00Z is the beginning of the Unix era, which is widely used by computer OS. "The " seconds since 1970-00-00-00-00T00:00:00:00Z" are widespread and are often referred to as Unix time or period seconds. Using the standard character chain "seconds since 1970-00-00T00-00:00:00:00Z" makes Unix time compliant with UDUNITS-2 and the Climate and Forecast Metadata Conventions (CF) that use UDUNITS-2 to define entities.
Presentation of Text - By standard Erdap uses the "extended" standard text strings which will be cut to the second text (e.g. 2011-04-26T14:07:12Z) when it formats tenses as text. EARDAP admins can set a given tag to show the time domain value more accurately (shortened to 0. 001 second, 0. 01 second, 0. 1 second) or less accurately (shortened to second, minutes, hours, date or month) to show the accuracy of the time domain value.
ERDDAP will accept a periodic delimiter (e.g. 2011-04-26T14:07:12. 059Z) or a command delimiter (e.g. 2011-04-26T14:07:12,059Z) when reading ISO 8601 x with no second. Currently ERDDDAP always uses a point delimiter when it writes to ISO 8601. Currently ERDDDAP does not currently natively display any other calender ( including the 365_day, 360_day, Noleap as well as Julyan calender, which are specified by the CF meetadata conventions).
You can, however, save such information in ERDDAP by saving the numbers or character string in a tag that has a name other than "time" and no "since" in the unit meterials. ERDDAP then does not interprete the value as a time and does not translate the value into "seconds since 01.01.1970-01T00:00:00:00Z". The user can retrieve the information in its initial state.
BC years and astronomical year - As defined in norm IS 8601:2004, ERDDAP uses only the Common Era (CE, AD) for years, not BCE. As the astronomical year is promoted by the International Organization for Standardization 8601:2004 and used by many science disciplines, and because oceansographers and climate scientists often use the year 0000 for climateologies, ERDDAP uses the astronomical year.
Thus the years are close to the epoch change in ERDDAP -0001, 0000, 0000, 0001, 0001, 0002. When you think about using astronomical years, ERDDAP will work for data far in the past and far in the present.
SeeDataNet saves the time as "Days since -4713-01-01-01T00:00:00:00Z", which is a relation to Mitternacht at the beginning of January 4713 B.C., the starting time for Chronological Julian Data (CJD). In the records. xml-Setup for a SeedDataNet record in ERDDAP, in the section for all time variable you have to therefore days since -4712-01-01T00:00:00:00Z so that 4713 BCE is given as astronomical year -4712.
ERDDAP, such as Unix Time and UDUNITS-2, uses the Coordinated Universal Time (UTC) system. It is the advanced GMT time system variant. Occasionally, however, it uses leaky seconds to remain near International Atomic Time (TAI). Satellite receivers utilize internal satellite time (which does not use leak seconds), but show the user how long it is to get there.
See http://tycho.usno.navy.mil/systime. html or other discussion about time systems. In strict terms, under some circumstances it cannot be used for distant periods in the near term (e.g. in models) because it cannot predict the appearance of leak seconds. Lap Seconds - Like Unix Time and UDUNITS-2, ERDDAP's "seconds since 1970-00-00T00:00:00:00Z" is a numerical coding (which does not use Lap Seconds) of the LTC time (which uses Lap Seconds).
ERDDAP will ignore leak seconds when it converts character strings to/from numerical time, such as Unix time and UDUNITS-2. Nevertheless, ERDDDAP, Unix time and UDUNITS-2 numerical time say that they all use Ultra-CT. Because computer watches are not good timepieces, they are drifting away from the unTC time and must sometimes be set back to the unTC time.
The Unix time handles leap seconds as part of the time difference due to the watch dropping. It allows the program to perform time encodings and computations and disregard leak seconds. The numerical time readings ERDDAP, Unix time and UDUNITS-2 treat every minute with 60 seconds, although pulses of 61 seconds are recorded for every minute of switching seconds.
Please be aware that databases like Oracle, MySQL (and probably MariaDB), PostgreSQL and tongues like C# also try to disregard leak seconds. There are no issues with the conversion of UTC string date+time+time+time zone readings to ERDDAP numerical readings when the time is then converted back to date+time+Zulu strings in a way that even disregards leaky seconds.
Unluckily, ERDDAP, Unix time and UDUNITS-2 numerical time have no mechanisms to uniquely code real leak seconds as numbers. As an example, both the 2008-12-31T23:59:60Z interleap second and the next second of 2009-01-01T00:00:00:00Z are coded as 1230768000 seconds since 1970-01-01T00:00:00:00Z. It is a mistake, but only affects the real seconds of leak.
Similarly, if you need to work out the precise number of seconds between two times in seconds you can use ERDDAP to process the time information, but to subtract one numerical time value from the other is only the first stage in the work. This value must be adjusted by hand by viewing a spreadsheet with leap seconds.
Lower resolving times and time spans (time spans) - If time information has been collected at a lower resolving time (e.g., a min, hr, day, daily, monthly, or year) or displays a time spans (e.g., a particular hr, daily, 7-day cycle, monthly, yearly), ERDDAP will require that a time (we call it "target time") be used to display that time or time spans.
The use of a nominally time allows time points, low definition time points and time periods to be operable. For example, you can use a time shifter to determine which subsets of the dataset are displayed in a particular application, such as Google Earth. Most frequently chosen times for the target time are the starting time and the centred time (less frequently, but has benefits when used with time shifters).
It is recommended to use the Long_name meta data to detect this (e.g. "Start time" or "Centered time"). With low dissolution periods, you should, for example, take "date", "month" and "year" into account. Alternatively, to more precisely display time periods, you can create a record that contains both a startTime and an endTime tag (and even a centeredTime if you want to include all possibilities).
Today' set-up is quite suitable for most scenarios and meets most people's expectation of time's functionality (even if they haven't thought about it in detail), but not all. This is how ERDDDAP works at the moment. Do you want to perform time conversions from a computer program, script or web page?
Changing the filename extensions from . html to . txt will cause ERDDAP to reply only with the text results. One example that transforms a character set time into a numerical time is: Or you can use another reformat, for example, An example that transforms a numerical time into a character chain time is:
We recommend the basic time unit size according to the standard size specified in standard size. However, you can specify the basic time in any standard size, e.g., please be aware that the "slash" size is understood in an American way (as month/date/year) and not in a Western way (as date/month/year). Some earlier ERDDAP releases require the use of an isoTime parameter name and an Iso 8601 formated text to be used in the numerical conversion strings.
Standard value is "seconds since 01.01.1970-01T00:00:00:00Z". One example that transforms any character set time into an iso8601 character set time is: Percentage of time is voluntary. When you specify a date and time period, the convertor returns a date and time. One example that transforms a unit string into a unit string that has an ie strings time is
Percentage encoding - The parameters value in the address (the parts after the'=' character) must be correctly percentage encoded: all other symbols as A-Za-z0-9_-!....