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Compact High Resolution Imaging Spectrometer (CHRIS)

CHRIS provides remotely-sensed multi-angle data at high spatial resolution and in superspectral/hyperspectral wavelengths. The instrument has a spectral range of 415-1050 nm, and provides observations at 19 spectral bands simultaneously, with a spatial resolution of 20 m at nadir and a swath width of 14 km. CHRIS is on board ESA's PRoject for On-Board Autonomy (PROBA). The PROBA satellite is on a sun-synchronous elliptical polar orbit since 2001 at a mean altitude of about 600 km. CHRIS coverage for the Murrumbidgee Catchment is summarised below. CHRIS data can be downloaded from ESA.

Mission	CHRIS
Sensor	Compact High Resolution Imaging Spectrometer
Spacecraft	PROBA
Launch date	22nd, Oct. 2001
Design life (year)	> 2
Orbit	Sun synchronous orbit, RAAN 10:30.
Spacecraft Operations Control Centre	ESA's Ground Segment Department
Accuracy (arcsec)	150
Waveband (nm)	415 - 1050
Spatial resolution (m)	20 at nadir
Incidence Angle (°)	±55, ±36, 0
Swath (km)	14
Temporal resolution (day)	Approximately 7

CHRIS overpass time

CHRIS 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. Date and time are in UTC. 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

2010/1/18

23:15:00

15

○

○

2010/1/23

11:44:57

16

○

2010/1/24

11:55:56

16

○

2010/1/26

23:05:24

18

○

2010/1/27

23:16:13

15

P03

○

○

2010/2/1

11:46:02

16

○

2010/2/2

11:57:00

16

○

2010/2/4

23:06:37

17

P05

○

○

2010/2/5

23:17:24

15

○

○

2010/2/10

11:47:06

17

○

2010/2/11

11:58:05

16

○

2010/2/12

22:57:07

10

P08

○

2010/2/13

23:07:49

15

○

○

2010/2/14

23:18:34

15

P10

○

○

2010/2/19

11:48:14

16

○

2010/2/20

11:59:13

17

○

2010/2/21

22:58:10

13

○

○