https://sideshow.jpl.nasa.gov/pub/iono_daily/ contains ionosphere products 
generated by the Ionospheric and Atmospheric Remote Sensing group at JPL.
Contact: Panagiotis.Vergados @ jpl.nasa.gov; Olga.Verkhoglyadova @ jpl.nasa.gov; Xing.Meng @ jpl.nasa.gov 

gim_for_research/
	jpli* files 
		2000-present 
		15 min resolution
		1 degree resolution
                NetCDF format
		no bias added

IONEX_final/
	JPLG* files
		11/19/2008-present
		50 hours latency
		2 hour resolution
		2.5 deg lat, 5.0 deg long resolution
		Shell height 450km
                IONEX format
		2 TECU bias added
                Same as jplg* files at CDDIS archive

IONEX_FOR_TOPEX/
	jplg* files
		1994-1998
		2 hour resolution
		2.5 deg lat, 5.0 deg long resolution
		Shell height 450km
                IONEX format
		no bias added

IONEX_rapid/									
	JPLH* files
		2009-present	
		50 hours latency
		1 hour resolution
		2 deg resolution
		Shell height 450km
                IONEX format
		2 TECU bias added
	JPLQ* files	
		2009-present	
		7 hours	latency
		2 hour resolution
		2.5 deg lat, 5.0 deg long resolution
		Shell height 450km 
                IONEX format
		2 TECU bias added	
                Same as jprg* files at CDDIS archive
	JPLR* files
		2009-present	
		7 hours	latency
		1 hour resolution
		2 deg resolution
		Shell height 450km
                IONEX_format
		2 TECU Bias added