HSC-G SKY images are not of very good quality, but we consider acceptable for general use. 

HSC-R2 SKY images were actually constructed from not only this run data but also the preceding/following observing runs data (202205^202206). This is because of a small number of the available data in this run. 

NB0497 SKY images are not of very good quality, even though they were constructed from multiple observing runs' data (202111^202206). They will be improved in future when new NB0497 data are taken. 

 NB0656 SKY images are not of very good quality, because of a small number of the available science viisits. They will be improved in future when new NB0656 data are taken.