ANZCW0301000001 AVHRR NDVI fortnightly series covering continental Australia at full resolution. Bureau of Meteorology Australia

AVHRR NDVI (Normalized Difference Vegetation Index) fortnightly series covering continental Australia at a 1 kilometre resolution. NDVI is a measure of the absorption of red light by plant chlorophyll and the reflection of infrared radiation by water -filled leaf cells. Its values broadly measure the density of active foliage.

 AGRICULTURE ATMOSPHERE ATMOSPHERE Pressure CLIMATE AND WEATHER HAZARDS Pests 112.5 -10 154 -10 154 -44 112.5 -44 112.5 -10 -10 -44 154 112.5 1991-04-01 current in progress monthly Unsigned 8 bit Generic Binary GIF Image Printed map Environment Australia internal use only.

These are the basic datasets received from Marine laboratories.

Positional error should not exceed 1km for the vast majority of pixel centres.

As determined by CSIRO processing of spectral response and computation of NDVI, see 'AVHRR DOCUMENTATION' held by Neil Freeman (ERIN).

The method of aggregation employed selects the maximum fortnightly value for output to each monthly pixel, so as to minimize atmospheric contamination - thus the monthly pixel values are cloud free.

All datasets are spatially complete - there are no missing sections. The data is temporally incomplete - March to November 1994 are missing.

 Environmental Resources Information Network (ERIN), Environment Australia Scientific Coordinator - Remote Sensing
GPO Box 787
Canberra ACT Australia 2620 +61 2 6274 1203 +61 2 6274 1333 shane@erin.gov.au 1996-11-21

Documentation of the Normalized Difference Vegetation Index (AVHRR) AVHRR data can be found at:-