Search 'N Order Web Interface (SNOWI)
SNOWI Help
Search
Order
Choosing a Dataset
Order Method
Search
This option takes your search criteria and returns a list of all corresponding granules.
You may then select granules from the list, enter your order information, and order.
Items with asterisks (*) are required fields. Alternately, you can choose to order all
corresponding granules automatically instead.
Dataset Information
- Choose the desired Dataset. (See Choosing a Dataset
below for more details.)
- Enter the maximum number of granules you want returned.
- Enter the maximum time limit for the search.
Search Criteria
- Enter the dates and times for temporal coverage.
- Enter the geographic coordinates you want to search within.
Values are already filled in for a default global search. If you want to
perform your own spatial search, remember that longitudes west of the
Greenwich Meridian are negative. The search will not complete successfully
if latitude and longitude values are in an incorrect order. Please consult
a map if you are unsure of the proper bounding coordinates.
- Choose whether or not you would like to restrict your search to return
only granules which have browse images available. If you select "No",
granules returned may or may not have browse images. If you select "Yes",
only granules with browse images will be returned; if there are none,
"No match found" will be returned.
- Choose whether or not you wish to automatically order all results. If you
select "No", the results of the search will be returned in a list, where you
can enter order information and select the desired granules. If you select
"Yes", order information fields will appear on the screen, which must be
filled out before the search can be completed. The search will then order
all corresponding granules automatically; no list will be displayed.
See Order Method below for information on the
Order Method field(s).
- Press the "Search" button. A "Search in Progress" page will be displayed
with your search criteria. When the search is completed, a "Results" page
will be displayed. Look for a status message that says
"Successful query Query results returned." At this point, you can either
perform a new search or, if you did not choose to automatically order all
results, proceed with the order. (The remaining steps will assume you did
not automatically order all results.)
Search Results
- Enter order options.
The results page will list the granules that satisfied your search criteria.
For your convenience, a link to an ASCII text version of the results is
available for your records. If there is a link called "Image" for a granule,
you may click on it to open a new window with the granule's browse image.
Check the granules you wish to order from the list.
- Fill out Order Method and the User Information,
and click "Order." The "Order in Progress" page will be displayed, followed
by a "Results" page when the order has been placed. The Status Message will
give you further information about the results of the order.
Order
This option bypasses search criteria altogether. It is the quickest method of
ordering data, but you must know the Granule IDs or the Granule Filenames that
you wish to order. An example Granule ID is "SC:MOD10A1.004:123456"; An example
Granule Filename is "MOD10_L2.A2000055.0005.004.2002354200352.hdf". All items
with asterisks (*) are required fields.
Dataset Information
- Choose the desired Dataset. (See Choosing a Dataset
below for more details.)
- Choose the Granule List Type that corresponds with the type of Granule
identification you will be using.
- Enter the Granule IDs or Filenames, one per line, into the Granule List.
- Enter the maximum time limit for the order. (This is the maximum time to
allow the order to be processed, not the time for the order to be
delivered).
Finish Order Placement
- Fill out Order Method and the User Information,
and click "Order." The "Order in Progress" page will be displayed, followed
by a "Results" page when the order has been placed. The Status Message will
give you further information about the results of the order.
Choosing a Dataset
There are a wide variety of Dataset products available from SNOWI. Both the Search
page and the Order page have sections to choose the desired Dataset from which to
retrieve data.
There are two ways to choose a Dataset. Note that making changes to the
"Short Name/ID", "Dataset Title", or "Dataset Version" fields will automatically update
the other fields, as appropriate.
- Enter the Dataset Short Name/ID. This is often followed by a dash and
the version number, though the version number can usually be left off,
in which case the most recent version will be selected automatically.
An example is MOD10A1-3, which is Version 3 of the
MODIS/Terra Snow Cover Daily L3 Global 500m ISIN Grid dataset.
- Choose the Dataset Title and Dataset Version from the dropdown lists. First,
select the Dataset Title. Doing this will cause the Dataset Version list to
be updated with appropriate values for the Dataset selected, with a default
selected automatically.
Order Method
SNOWI is restricted to FTP orders only. There are two FTP options available:
- FTP Pull - Choosing this method will cause a temporary
FTP directory to be created for your order. The ordered granules will be
put in this directory, and an email will be sent to you with instructions
on how to access the granule files.
- FTP Push - This will cause the order to be pushed
directly into an FTP directory chosen by you. When this option is selected,
you mush enter the FTP Host Name, destination directory, a username to
access the directory, and a password.
NOTE!!!! The FTP Push option is NOT SECURE,
including the submission of the order in SNOWI. You are strongly encouraged
to use an anonymous FTP site as the push destination, or change your
password immediately after the data push.
For additional information or questions, please contact:
NSIDC User Services
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder, CO 80309-0449 USA
phone: +1 303.492.6199
fax: +1 303.492.2468
form: Contact NSIDC User Services
e-mail: nsidc@nsidc.org
