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Initial Calibration Result of JAXA standard products(As of October 23, 2006)


PRISM Level 1B2 data products

- Radiometric Accuracy
1) Relative Accuracy
Better than 1.2% (better than 3DN)(RMS): Vertical streaking stripes may appear in some of the images with similar characteristics.
2) Absolute Accuracy
Better than 6.2 %(RMS)

- Geometric Accuracy
1) Absolute Accuracy
 Error in pixel direction
(cross track)
Error in line direction
(along track)
Forward view (RMS)13 m64 m
Nadir view (RMS)17 m34 m
Backward view (RMS)32 m32 m
Absolute accuracy is defined as the RMS error; no reference is made to Ground Control Points (GCP).

2) Relative Accuracy
 Error in pixel direction
(cross track)
Error in line direction
(along track)
 
Std. dev. in a scene(1σ)4 m6mfor all three kinds of views

AVNIR-2 Level 1B2 data products

- Radiometric Accuracy
1) Relative Accuracy
Better than 0.4% (better than 1DN)(RMS)
2) Absolute Accuracy
Band 1 to 3: better than 6.2 %(RMS)
Band 4: better than 15.8 %(RMS)

- Geometric Accuracy (for all pointing angles)
1) Absolute Accuracy
 Error in pixel direction
(cross track)
Error in line direction
(along track)
RMS520 m370 m
Absolute accuracy is defined as the RMS error; no reference is made to Ground Control Points (GCP).

2) Relative Accuracy
 Error in pixel direction
(cross track)
Error in line direction
(along track)
Std. dev. in a scene(1σ)14 m6 m

PALSAR Level 1.1/1.5 data products

- Radiometric Accuracy(for all off-nadir angles)
Absolute Gain     0.7dB(1σ)
VV/HH Gain Ratio(PLR)     0.023dB(1σ)
VV/HH Phase Difference(PLR)     0.104(1σ)

- Geometric Accuracy(for all off-nadir angles)
RMS 8m (Std Dev. 5m): FBS, FBD
RMS 11m (Std Dev. 6m): PLR
RMS Better than 100m: WB1, WB2

<Evaluation Method>
- Radiometric Accuracy of PRISM/AVNIR-2
Compared with TERRA/AQUA MODIS data (over Desert, Ocean, etc.)

- Geometric Accuracy of PRISM/AVNIR-2
Compared with GCPs (CAL/VAL sites) considering target height

- Radiometric Accuracy of PALSAR
Analyzed data from Corner Reflectors (CAL/VAL sites) and uniform forests over Amazon

- Geometric Accuracy of PALSAR
Compared with GPS measured data of Corner Reflectors (CAL/VAL sites) considering target height

<Future Improvement>
- To improve vertical streaking stripes of PRISM
- To improve geometric accuracy of PRISM/AVNIR-2.

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