Polar Spatial Query at NSIDC

Polar Spatial Query: Orbit Search and Gridding (PSQ)

For information about projection and grid parameters used at NSIDC see:

Projection and grid output options currently available in the PSQ are:

EASE-Grids:

Polar Stereographic Grids:

Cylindrical Grids:

The following table summarizes the valid ranges of input values for grids used in the PSQ.

Grid name	Grid size (col,row)	Latitude range	Longitude range
AVHRR EASE-Grid North 1.25 km	7220,7220	29.72191° N - 90° N	180° W - 180° E
AVHRR EASE-Grid South 1.25 km	6420,6420	36.96667° S - 90° S	180° W - 180° E
AVHRR EASE-Grid North 5 km	1805,1805	29.74956° N - 90° N	180° W - 180° E
AVHRR EASE-Grid South 5 km	1605,1605	36.99339° S - 90° S	180° W - 180° E
SSM/I EASE-Grid North 12.5 km	1441,1441	0.25845° N - 90° N	180° W - 180° E
SSM/I EASE-Grid South 12.5 km	1441,1441	0.25845° S - 90° S	180° W - 180° E
SSM/I EASE-Grid Global 12.5 km	2766,1171	85.95000° N - 85.95000° S	179.93° W - 180.07° E
SSM/I EASE-Grid North 25 km	721,721	0.33836° N - 90° N	180° W - 180° E
SSM/I EASE-Grid South 25 km	721,721	0.33836° S - 90° S	180° W - 180° E
SSM/I EASE-Grid Global 25 km	1381,586	86.72000° N - 86.72000° S	180° W - 180° E
SSM/I Polar Stereographic North 25 km	304,448	30.98°N - 90°N	180°W - 180°E
SSM/I Polar Stereographic North 12.5 km	608,896	30.98°N - 90°N	180°W - 180°E
SSM/I Polar Stereographic South 25 km	316,332	39.23°S - 90°S	180°W - 180°E
SSM/I Polar Stereographic South 12.5 km	632,664	39.23°S - 90°S	180°W - 180°E
Cylindrical Equidistant 1°	360,180	90°N - 90°S	180°W - 180°E
Cylindrical Equidistant 0.5°	720,360	90°N - 90°S	180°W - 180°E
Cylindrical Equidistant 0.25°	1440,720	90°N - 90°S	180°W - 180°E
Cylindrical Equidistant 5'	4320,2160	90°N - 90°S	180°W - 180°E
Cylindrical Equidistant 30"	43200,21600	90°N - 90°S	180°W - 180°E

Information about temporal coverage and missing dates for some data is summarized in the following documentation: