GOES-18

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GOES-18
GOES-T Satellite at Processing Facility (51854351059).jpg
GOES-T in the Astrotech Space Operations facility in Titusville, Florida in January 2022
Mission type Weather and Meteorology
Operator NOAA  / NASA
COSPAR ID 2022-021A [1]
SATCAT no. 51850
Mission duration15 years (planned)
1 year, 2 months, 26 days (elasped)
Spacecraft properties
Spacecraft GOES
Spacecraft typeGOES-R Series
Bus LM-A2100A
Manufacturer Lockheed Martin
Launch mass5,192 kg (11,446 lb)
Dry mass2,857 kg (6,299 lb)
Dimensions6.1 × 5.6 × 3.9 m (20 × 18 × 13 ft)
Power4 kW
Start of mission
Launch date1 March 2022, 21:38 UTC
Rocket Atlas V 541
Launch site Cape Canaveral, SLC-41
Contractor United Launch Alliance
Entered service3 January 2023
Orbital parameters
Reference system Geocentric orbit
Regime Geostationary orbit
Longitude136.9° west
Semi-major axis 42,164.0 km (26,199.5 mi)
Eccentricity 0.0001730
Perigee altitude 35,957 km (22,343 mi)
Apogee altitude 35,972 km (22,352 mi)
Inclination 0.0558°
Period 24 hours
Epoch June 2, 2022 [2] [3]
GOES-T logo.png
GEOS T mission insignia
  GOES-17
GOES-U  
 

GOES-18 (designated pre-launch as GOES-T) is the third of the "GOES-R Series", the current generation of weather satellites operated by the National Oceanic and Atmospheric Administration (NOAA). The current and next satellites of the Series (GOES-16, GOES-17, GOES-18, and GOES-U) will extend the availability of the Geostationary Operational Environmental Satellite (GOES) satellite system until 2037. The satellite is built by Lockheed Martin in Littleton, Colorado. It is based on the A2100A satellite bus and will have an expected useful life of 15 years (10 operational after five years in orbit replacement). [4]

Contents

Benefits and applications

The GOES-R Series also continues the legacy Geostationary SAR (GEOSAR) function of the SARSAT system onboard NOAA's GOES satellites which has contributed to the rescue of thousands of individuals in distress. The GOES-R Series SARSAT transponder operates with a lower uplink power than the previous system, enabling GOES-R Series satellites to detect weaker beacon signals.

Redesign

In May 2018, NOAA announced that the recently launched GOES-17 satellite was suffering from a severe malfunction in its instrument cooling system which resulted in degraded performance of its infrared sensors. The cause of the problem was determined to be with the loop heat pipe (LHP), which transports heat from the Advanced Baseline Imager (ABI) to a radiator for rejection into space. Since the LHP design was shared among all four GOES-R Series satellites, a redesign was required to prevent the anomaly from happening again on GOES-T and GOES-U. Lockheed Martin had already completed assembly of GOES-T and had to remove the ABI instrument in October 2018 and ship it to its manufacturer, Harris Corporation, to be rebuilt. [5] [nb 1]

Launch

GOES-T was launched on March 1, 2022 from Cape Canaveral Space Force Station (CCSFS), Florida, United States. [6] Because of the repairs to correct the loop heat pipe problem, the launch had slipped from its originally scheduled date of February 16, 2022. [7] PHOTOS of Launch

GOES-T was renamed GOES-18 on March 14, 2022 after reaching geostationary orbit. [8]

GOES-18 will undergo a "split" post-launch testing (PLT) phase that will get GOES-18 into position near the current GOES-West location in August 2022, so its Advanced Baseline Imager (ABI) data will be available for the "warm" period that degrades some GOES-17 imagery during the height of hurricane season. [9]

The satellite was launched to the regular 89.5 degrees west checkout location and will undergo part one of PLT from this location. GOES-18 will then drift to 136.8 west and perform the remainder of PLT at that location near GOES-West. The 0.4 degree offset from GOES-17 will allow X-band RDL downlink from both GOES-17 and GOES-18. The 0.2 degree offset from 137.0W meet ground system product generation requirements. Both GOES-17 and GOES-18 images will be remapped to 137.0W. [9]

The transition plan allows for early operational use of GOES-18 ABI data after Beta maturity is achieved and incorporates radio frequency conflict mitigation between GOES-17 and GOES-18 and telemetry and command uplinks and downlinks. Users will not need to repoint their antennas. GOES-18 ABI data will be available via a Cloud interface and interleaving with GOES-17 non-ABI product data. [9]

After its operational transition, GOES-18 will be nudged over to the GOES-West position at 137.2W and GOES-17 will drift to 105W and placed in on-orbit storage. Assuming a normal launch and checkout, GOES-18 will transition to become the operational GOES-West satellite in early 2023. [9]

NOAA announced plans to move the geostationary weather satellite into an operational role "as soon as possible" by ensuring GOES-T systems perform as expected before moving it into an operational role. [10]

The ABI data of GOES-T is scheduled to be interleaved in GOES-17 data from August 1 to September 6 and October 15 to November 11, 2022, also the ABI warm periods of GOES-17. [9] GOES-T became operational as GOES-West on January 4, 2023 joining GOES-16 (operating as GOES-East), while GOES-17 was moved to an intermediate position between the two to serve as backup. [11]

The GOES-T launch was dedicated to Mark Timm, with the following message inscribed on the rocket fairing: "In memory of our colleague and friend - Mark Timm - The ULA Team"

Imagery

This GOES-18 image shows the contiguous United States observed by each of the ABI's 16 channels on May 5, 2022. 2022-05 CONUS 16Panel GOES18 05May2022 1801UTC WithLogosAndLabels.gif
This GOES-18 image shows the contiguous United States observed by each of the ABI's 16 channels on May 5, 2022.

On May 11, 2022, NOAA shared the first images of the Western Hemisphere from its GOES-18 satellite. The satellite's Advanced Baseline Imager (ABI) instrument captured views of Earth. The ABI views Earth with sixteen different channels, each measuring energy at different wavelengths along the electromagnetic spectrum to obtain information about Earth's atmosphere, land, and ocean.

GOES-18 full disk GeoColor image from May 5, 2022 GOES-18 full disk GeoColor image from May 5, 2022.png
GOES-18 full disk GeoColor image from May 5, 2022

Data from multiple ABI channels can be combined to create imagery that approximates what the human eye would see from space. Combining data from different channels in different ways also allows meteorologists to highlight features of interest.

Notes

  1. The LHP was actually manufactured by Orbital ATK, which is now a part of Northrop Grumman, while the ABI was built by Exelis Inc., now a part of L3Harris Technologies.

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<span class="mw-page-title-main">Weather satellite</span> Type of satellite designed to record the state of the Earths atmosphere

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<span class="mw-page-title-main">National Environmental Satellite, Data, and Information Service</span>

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References

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  2. "GOES 18". heavens-above.com. Retrieved 15 July 2022.
  3. "GOES 18". orbitalfocus.uk. Retrieved 15 July 2022.
  4. "Mission overview". NOAA. January 2021. Retrieved 20 January 2021.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  5. "Lockheed Martin halts work on GOES-T to wait for instrument fix". SpaceNews. 9 January 2019. Retrieved 26 May 2019.
  6. Foust, Jeff (2 March 2022). "Atlas 5 launches GOES-T weather satellite". SpaceNews. Retrieved 2 March 2022.
  7. "NASA, NOAA Adjust GOES-T Launch Date". NASA. 18 November 2021. Retrieved 18 November 2021.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  8. NOAA, NESDIS (14 March 2022). "NOAA's GOES-T Reaches Geostationary Orbit, Now Designated GOES-18". NOAA NESDIS. Retrieved 14 March 2022.
  9. 1 2 3 4 5 "GOES-18 Post-Launch Testing and Transition to Operations". GOES-R Series Program Office. Retrieved 2 February 2022.PD-icon.svg This article incorporates text from this source, which is in the public domain .
  10. Werner, Debra (25 June 2021). "NOAA to replace GOES-17 satellite ahead of schedule". SpaceNews. Retrieved 28 June 2021.
  11. "Earth from Orbit: NOAA's GOES-18 is now GOES West". NOAA . 4 January 2023. Retrieved 5 January 2023.