Type an exact string into string field boxes such as Dataset ID, Principal Investigator, or Spectral Element ('Names of Filters/Gratings').

*ab*c

abc, def

ab*, def

abc, de*, fg*

!abc

!ab*c

!abc,!def

!ab*,!cd*

any number

Type a number (or = a number) on a search condition field to retrieve observations matched with the exact value of the search parameter.

The first example returns observations whose exposure time is exactly 1000 seconds, the second example returns observations with exposure time equal to exactly 14660 seconds.

> number

>= number

< number

<= number

Type a number with simple arithmetic operations (<, >, <=, or >=) to filter the search parameters.

Only observations whose spectral resolving power is larger than or equal to 20000 are returned in this example, where the condition of '>= 20000' is used.

Use the special character expression of two periods (..) between two numeric values (numbers) to specify a range.

This example (in the RA condition box entering 15.0567..17.6709 and in the Dec condition box entering -10.00..5.56) returns only observations whose targets are located between Right Ascension 15.0567 <= RA (degrees) <= 17.6709 AND Declination -10.00 <= Dec (degrees) <= 5.56.

num1 +- num2

num1 +- num2%

Use the special character expression of +- between two numeric values (numbers) to specify a calculated range.

This example (in the Exp Time condition box entering 400 +- 300 and in the Central Wavelength condition box entering 3000 +- 15%) returns only observations whose targets have an Exposure Time of 100 <= Exp Time <= 700 AND Central Wavelength 2550 <= Central Wavelength <= 3450.

Each condition for Date and Time can be directly typed using a valid format. However, it is not required to add Time constraints to initiate searches.

Another option to filter the Date/Time constraint is using the built-in date calendar and the time clock, as seen in the video clip.

> yyyy-mm-dd

>= yyyy-mm-dd

< yyyy-mm-dd

<= yyyy-mm-dd

Type dates with simple arithmetic operations (<, >, <=, or >=) to filter the search. This example returns all observations released on and before October 21, 1999 (1999-10-21).