ITOS-E

{{Short description|American weather satellite}}

{{Use mdy dates|date=October 2018}}

{{Infobox spaceflight

| name = ITOS-E

| mission_type = Weather

| operator = NOAA{{cite web|title=NASA/NSSDC ITOS-E1 spacecraft details|url=https://nssdc.gsfc.nasa.gov/nmc/spacecraft/display.action?id=ITOS-E1|access-date=June 7, 2018}}

| mission_duration = Launch failure

| manufacturer = RCA Astro

| launch_mass = {{convert|747|kg|lb}}

| launch_date = {{start date text|July 16, 1973, 00:00|timezone=yes}} UTC{{cite web|url=http://planet4589.org/space/log/launchlog.txt|title=Launch Log|first=Jonathan|last=McDowell|work=Jonathan's Space Page|access-date=June 7, 2018}}

| launch_rocket = Delta-300

| launch_site = Vandenberg SLC-2W

| orbit_epoch = Planned

| orbit_reference = Geocentric

| orbit_regime = Sun-synchronous

| apsis = gee

| programme = ITOS

| previous_mission = NOAA-2

| next_mission = NOAA-3

}}

ITOS-E was a weather satellite operated by the National Oceanic and Atmospheric Administration (NOAA). It was part of a series of satellites called ITOS, or improved TIROS.{{cite encyclopedia|last=Wade|first=Mark|title=ITOS|encyclopedia=Encyclopedia Astronautica|url=http://www.astronautix.com/craft/itos.htm|archive-url=https://web.archive.org/web/20020621225655/http://www.astronautix.com/craft/itos.htm|url-status=dead|archive-date=June 21, 2002|access-date=June 7, 2018}} ITOS-E was released on July 16, 1973, from the Vandenberg Air Force Base, California, with a Delta rocket, but failed to achieve orbit.