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Advanced Visible and Near Infrared Radiometer type 2 (AVNIR-2)

Source: http://spacespin.org, accessed on 28th, Apr. 2010	Source: http://www.eorc.jaxa.jp, accessed on 28th, Apr. 2010 (modified)

AVNIR-2 is a visible and near infrared radiometer onboard ALOS. AVNIR-2 is a successor to AVNIR that was onboard the ADvanced Earth Observing Satellite (ADEOS), which was launched in August 1996. Its instantaneous field-of-view is the main improvement over AVNIR. AVNIR-2 also provides 10m spatial resolution images, an improvement over the 16m resolution of AVNIR in the multi-spectral region. Improved CCD detectors (AVNIR has 5,000 pixels per CCD; AVNIR-2 7,000 pixels per CCD) and electronics enable this higher resolution. The pointing angle of AVNIR-2 is +44° and -44°. AVNIR-2 coverage for the Murrumbidgee Catchment is summarised below. AVNIR-2 data can be downloaded from JAXA.

Instrument	Advanced Visible and Near Infrared Radiometer type 2
Spacecraft	ALOS
Launch date	24th, Jan. 2006
Design life (year)	3 - 5
Orbit	Sun-Synchronous, sub-Recurrent orbit with altitude of 691.65 km at Equator and with inclination of 98.16 °.
Spacecraft Operations Control Centre	Japan Aerospace Exploration Agency (JAXA)
Channel and wavelength (micrometers)	4 VNIR bands (0.42 - 0.89)
Spatial resolution (m)	10 at nadir
Incidence Angle (°)	±44
Swath (km)	70
Temporal resolution (day)	Repeat Cycle: 46, Sub Cycle: 2

AVNIR-2 overpass time

AVNIR-2 coverage for the Murrumbidgee Catchment during the first AACES campaign have been determined from a Fortran program based on NORAD data for 6th, Nov. 2009, and are summarized in the table below. The date and time are UTC time. Aircraft flights were assumed to be conducted at 7:45 for descending overpass and 20:35 for ascending overpass.

	: Transect flight within 6 hours		: Patch flight within 6 hours
●	: Fully covered	○	: Partially covered

UTC Date

Start UTC Time

Duration (s)

Flight

Patch

1

2

3

4

5

6

7

8

9

10

2010/1/19

5:22:44

28

○

○

○

2010/1/19

16:38:04

25

T00

○

○

○

2010/1/23

5:11:22

25

○

2010/1/23

16:26:52

27

○

○

○

2010/1/26

5:28:16

29

○

●

○

2010/1/26

16:43:28

27

○

○

○

2010/1/30

5:16:54

27

○

○

2010/1/30

16:32:19

25

○

○

○

2010/2/2

5:33:48

23

○

2010/2/3

16:21:11

22

○

2010/2/6

5:22:25

29

○

●

○

2010/2/6

16:37:43

27

P05

○

○

○

2010/2/10

5:11:01

30

○

○

2010/2/10

16:26:31

27

○

○

○

2010/2/13

5:27:57

29

○

●

○

2010/2/13

16:43:07

27

○

○

2010/2/17

5:16:34

28

○

●

○

2010/2/17

16:31:57

26

P09

○

○

○

2010/2/21

16:20:46

26

○

○