Calibrated sample products can be available at EORC via. bellow web site;
where, you can find "Sample Products Dataset 2 for the Advanced Land Observing Satellite (ALOS)" at "JAXA/EORC 082".
Please refer "Product Format Descriptions" to get data descriptions.
JAXA (and METI for PALSAR) retains ownership of data. JAXA cannot guarantee any problem caused by or possibly caused by using the data.
When print or publish the image using the sample product, you have to describe "the original data are provided by JAXA as the ALOS sample product" and " © JAXA (and METI for PALSAR)".
(Last Update: Dec. 9, 2019)