IRNSS-1D

{{use dmy dates|date=January 2014}}

{{use Indian English|date=January 2014}}

{{Infobox spaceflight

| name = PSLV-C27/IRNSS-1D

| image = IRNSS-1D.webp

| image_caption =

| mission_type = Navigation

| operator = ISRO

| website = http://www.isro.gov.in/Spacecraft/irnss-1d

| COSPAR_ID = 2015-018A

| SATCAT = 40547

| mission_duration = 12 years

| spacecraft = IRNSS-1D

| spacecraft_bus = I-1K

| manufacturer = ISRO Satellite Centre
Space Applications Centre

| dry_mass = {{convert|598|kg|lb}}

| launch_mass = {{convert|1425|kg|lb}}

| power = 1,660 W

| launch_date = {{start date|2015|03|28|11|49|00|7=Z}}{{cite web|last1=Graham|first1=William|title=PSLV launches with IRNSS-1D to open India's 2015 campaign|date=28 March 2015 |url=http://www.nasaspaceflight.com/2015/03/pslv-launch-irnss-1d-indias-2015-campaign/|publisher=NASASpaceflight.com|access-date=28 March 2015}}

| launch_rocket = PSLV-XL C27{{cite web|url=http://www.isro.gov.in/irnss-programme/pslv-c27-irnss-1d-mission|title=PSLV-C27/IRNSS-1D Mission|access-date=2015-03-02|publisher=ISRO|archive-url=https://web.archive.org/web/20150225004112/http://isro.gov.in/irnss-programme/pslv-c27-irnss-1d-mission|archive-date=25 February 2015|url-status=dead}}

| launch_site = Satish Dhawan SLP

| launch_contractor = ISRO

| disposal_type =

| deactivated =

| last_contact =

| decay_date =

| orbit_epoch = 5 May 2015, 20:43:00 UTC{{cite web|url=http://www.n2yo.com/satellite/?s=40547|title=IRNSS 1D Satellite details 2015-018A NORAD 40547|publisher=N2YO|date=10 May 2015|access-date=10 May 2015}}

| orbit_reference = Geocentric

| orbit_regime = Geosynchronous

| orbit_periapsis = {{convert|35750.0|km|abbr=on}}

| orbit_apoapsis = {{convert|35884.1|km|abbr=on}}

| orbit_inclination = 30.43 degrees

| orbit_period = 1436.1 minutes

| orbit_longitude = 111.75° East

| apsis = gee

| programme = NavIC

| previous_mission = IRNSS-1C

| next_mission = IRNSS-1E

| insignia =

| insignia_caption =

| insignia_alt =

| insignia_size =

}}

IRNSS-1D is a satellite in the Indian Regional Navigational Satellite System (IRNSS) constellation. The satellite is the fourth of seven in the constellation, launched after IRNSS-1A, IRNSS-1B and IRNSS-1C. The satellite is the only satellite in the constellation slated to provide navigational services to the region. The satellite will be placed in geosynchronous orbit.{{cite web|url=http://space.skyrocket.de/doc_sdat/irnss.htm|title=IRNSS |publisher=space.skyrocket.de |access-date=6 December 2014}} It was launched successfully on 28 March 2015 onboard ISRO's PSLV-C27 from Satish Dhawan Space Centre, Sriharikota.{{cite web|url=http://www.ndtv.com/india-news/indias-fourth-navigational-satellite-irnss-1d-launched-from-sriharikota-750364|title=India's Fourth Navigational Satellite IRNSS-1D Launched From Sriharikota}}{{cite web|title=ISRO puts India's Navigation satellite IRNSS 1B into orbit|url=http://news.biharprabha.com/2014/04/isro-puts-second-irnss-navigation-satellite-into-orbit/|work=IANS|publisher=news.biharprabha.com|access-date=4 April 2014}}{{cite news|title=IRNSS 1-D launch put off|url=http://www.thehindu.com/news/cities/bangalore/irnss1d-launch-put-off/article6959479.ece|work=India|date=4 March 2015 |publisher=thehindu.com|access-date=4 March 2015}}