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CLARREO Pathfinder Mission Timeline
2016-2024
2016
Pre-Phase A


Pre-Phase A

April 2016

Official Beginning of CLARREO Pathfinder

The NASA Headquarters Earth Science Division gave approval to NASA Langley Research Center to formally begin CPF. The approval states that CPF will include a Reflected Solar Spectrometer likely to be built by the Laboratory for Atmospheric and Space Physics (LASP) in Boulder, Colorado.

2016
CPF Calibration and Measurement Approach
April 2016

April 2016

CPF Begins Concept Studies (Pre-Phase A)

During this phase, the mission investigates alternatives for initial mission concepts, architectures, potential launch vehicles, and concepts of operations. These alternatives are evaluated to determine the most feasible mission concepts that would enable mission success.

2016
Gary Fleming presents at 2016 Mission Concept Review (MCR). Credits: NASA
2016

August 2016

Evaluation of CPF Mission Concept (Mission Concept Review)

A review panel evaluates the feasibility of executing the proposed mission concept and ability to meet mission goals and objectives.

2017
2017 SRR/MDR
Pre-Phase A

January 2017

CPF Receives Approval to Proceed to Next Phase: Concept and Technology Development (Key Decision Point – A)

The mission demonstrates that it addresses critical NASA objectives and that project planning is mature enough to begin the Concept and Technology Development Phase (Phase A).

2017
Phase A
January 2017

January 2017

CPF Begins Concept & Technology Development (Phase A)

The project further advances mission and operational concepts and establishes an initial project plan. It also refines its requirements and continues to assess technology maturity and the need for additional technology development.

2017
NASA LaRC and LASP team meet to discuss CLARREO Pathfinder’s needs for data at a 2-day Data Management Workshop held at LaRC in April 2017
2017

April 2017

NASA LaRC and LASP teams meet to discuss CLARREO Pathfinder’s needs for data at a 2-day Data Management Workshop held at LaRC in April 2017.

2017
Evaluation of the CPF System Requirements and Proposed Architecture (System Requirements Review/Mission Definition Review)
2017

July 2017

Evaluation of the CPF System Requirements and Proposed Architecture (System Requirements Review/Mission Definition Review)

A review panel evaluates the preliminary project plan, system requirements, and proposed architecture to ensure mission requirements will be met.

Phase A
2018
NASA Awards CPF Prime Contract to Laboratory for Atmosphere and Space Physics (LASP)
2018 – Phase A

September 2018

NASA Awards CPF Prime Contract to Laboratory for Atmosphere and Space Physics (LASP)

LASP becomes an official partner of the CPF mission and receives the contract to design, build, integrate, and operate the main elements of the CPF payload, the core of which is based upon the HyperSpectral Imager for Climate Science (HySICS) instrument. The contract also includes other aspects of LASP’s role on CPF including designing and providing the pointing system.

2018
Re-evaluation of CPF System Requirements and Proposed Architecture (delta-System Requirements Review/Mission Definition Review)
2018

November 2018

Re-evaluation of CPF System Requirements and Proposed Architecture (delta-System Requirements Review/Mission Definition Review)

A review panel evaluates advancements in mission and system requirements and architecture design after programmatic uncertainty incurs delays in the CPF lifecycle. This delta review ensures any new design elements still satisfy mission requirements.

Phase B
2018
2018 – Phase B

December 2018

CPF Begins Preliminary Design and Technology Completion (Phase B)

The project further matures the mission concept, architecture, and operations plans. It also matures preliminary instrument and mission design and initiates development of engineering prototypes of key payload subsystems.

2018
Phase B

April 2018

Yolanda Shea & Gary Fleming share the benefits of the CLARREO Pathfinder mission with community stakeholders during a tour of NASA LaRC.

2019
2019 Preliminary Design Review (PDR) at LASP
2019

May 2019

Evaluation of Preliminary Mission Design (Preliminary Design Review)

A review panel evaluates the preliminary mission design to assess its compliance with requirements. This includes payload and instrument components, science data processing, and the various mission interfaces.

2019
Gary Fleming presents at 2019 Preliminary Design Review (PDR) at LASP
2019

July 2019

CPF Receives Approval to Proceed to Next Phase: Implementation (Key Decision Point – C)

The project demonstrates that it is ready to enter the Implementation Phase by illustrating that the project planning, technical, cost, and schedule baselines are adequate to enable mission success. Passing this gate review establishes Center (Langley) and Agency (NASA) commitments.

Phase C
2019
3D model of the Climate Absolute Radiance and Refractivity Observatory Pathfinder (CLARREO-PF) Credits: NASA
Phase C

July 2019

CPF Enters Final Design and Fabrication Phase (Phase C)

The project completes testing of engineering prototypes of key payload subsystems and develops final detailed payload and ground system designs. Following a Critical Design Review, the project initiates fabrication, characterization, and testing of the flight payload components and subsystems. They also begin construction of a life-sized 3D model of the payload.

2020
2020 – Phase C

March 2020

Evaluation of Matured CPF Design Ability to Meet Mission Requirements (Critical Design Review)

A review panel evaluates the matured payload and mission design for its ability to meet requirements and the project’s readiness to continue with payload fabrication and assembly.

2021
The LASP team continues working on the structural elements of the HySICS Pointing System
2021

February 2021

The LASP team continues working on the structural elements of the HySICS Pointing System.

This includes (a) Installation of the azimuth gimbal actuator into the pointing system pedestal; (b) The instrument “cradle” (tan-colored) installed on the pointing system yoke which will enable elevation axis rotation, which is then installed atop the pedestal; (c) a view inside the cradle where the HySICS instrument and support electronics will reside.

2021
The HySICS mass model gets installed in the HPS cradle at LASP
2021

March 2021

The HySICS mass model gets installed in the HPS cradle at LASP.

2021
Cold target test dry runs begin on the XYZ at LASP
2021

March 2021

Cold target test dry runs begin on the XYZ at LASP.

2021
Mark Griffith and Robert Andrews working with the CLARREO Pathfinder model. Credits: NASA/Dave Bowman
2021

April 2021

Mark Griffith and Robert Andrews working with the CLARREO Pathfinder model in April 2021. Credits: NASA/David C. Bowman

2021
The HySICS Enclosure Baseplate heater string Installation begins at LASP
2021

April 2021

The HySICS Enclosure Baseplate heater string Installation begins at LASP.

2021
Assisted by Nancy Holloway, Gary Fleming recognized those who worked on the CLARREO Pathfinder 3D model. Credits: NASA/David C. Bowman
2021

April 2021

Assisted by Nancy Holloway, Project Manager Gary Fleming recognized those who worked on the CLARREO Pathfinder 3D model.

2021
Particle count measurements are taken of the Goddard Laser for Absolute Measurement of Radiance (GLAMR) integrating sphere in a Class 10K clean tent at GSFC.
2021

April 2021

Particle count measurements are taken of the Goddard Laser for Absolute Measurement of Radiance (GLAMR) integrating sphere in a Class 10K clean tent at GSFC.

2021
HySICS Pointing System
2021

April 2021

The HySICS Pointing System undergoes assembly and integration at LASP.

2021
Project Scientist Yolanda Shea discusses the CLARREO Pathfinder mission using the team's 3D model during NASA Earth Science Division Director Karen St. Germain's visit to NASA LaRC.
2021

July 2021

Project Scientist Yolanda Shea discusses the CLARREO Pathfinder mission using the team’s 3D model during NASA Earth Science Division Director Karen St. Germain’s visit to NASA LaRC.

2021
The CLARREO Pathfinder Team at LaRC completes assembly of the Power Converter Unit (PCU), which is responsible for directing power to the rest of the payload.
2021

June 2021

The CLARREO Pathfinder Team at LaRC completes assembly of the Power Converter Unit (PCU), which is responsible for directing power to the rest of the payload.

2021
Stephen Bowen, Robert Walker, Juan Mosquera, David McLain, Kenny Elliott are involved with the testing for the CLARREO PF PCU. Photo Credit: NASA/Dave Bowman
2021

July 2021

The PCU undergoes environmental testing in the lab at LaRC before it’s shipped to LASP for integration.

2021
Stephen Bowen with the CLARREO-PF PCU before it's shipped to LASP. Photo Credit: NASA/Dave Bowman
2021

September 2021

Stephen Bowen examines the PCU before it’s shipped to LASP.

2021
The CLARREO Pathfinder team celebrates completing & shipping the Power Converter Unit (PCU) to partner LASP. The PCU serves as the power interface between CLARREO Pathfinder and the ISS, ensuring that the right level of power is delivered to the rest of the CLARREO Pathfinder payload. (Photo credit: NASA/Mark Knopp).
2021

September 2021

Members of the LaRC team celebrate completion & the shipping of the PCU to LASP.

2021
The HySICS Pointing System is moved onto the baseplate at LASP
2021

December 2021

The HySICS Pointing System is moved onto the baseplate at LASP.

2022
Yolanda Shea & Gary Fleming share the importance of CLARREO Pathfinder with Bill Nelson, NASA Administrator, and members of Congress during their visit to NASA Langley. (Photo credit: NASA/David C. Bowman)
2022

March 2022

Project Scientist Yolanda Shea delivers an overview of the CPF mission to NASA Administrator Senator Bill Nelson.

2022
Phase C
Phase C

May 2022

Main Element of CPF Payload, HySICS Instrument, Complete

HySICS Instrument assembly, testing, and characterization is complete at LASP. Preparation for payload-level integration begins.

2022
2022

May 2022

Independent Calibration Performed

This independent calibration activity will be used as an informal validation of the official on-orbit calibration. It combines a pre-flight absolute radiometric calibration of HySICS and an instrument numerical model to transfer the pre-launch calibration to orbit.

2022
Phase D
2022 Phase D

August 2022

CPF Begins System Assembly, Integration, and Test (Phase D)

The project assembles and integrates all payload hardware and software for payload-level testing and requirements verifications. The payload is prepared for launch and operations.

2022
2022

November 2022

Evaluation of Readiness to Proceed with Payload Environmental Testing (Pre-Environmental Review)

A review panel evaluates the payload status, the project’s readiness to proceed with environmental testing of the integrated payload, and that the project is on track to complete payload development.

2023
2023 – Phase D

April 2023

Assembly, Integration, and Testing (AI&T) Complete

AI&T of the CPF Payload is complete. Environmental testing has demonstrated that the payload can withstand launch conditions and operate in the space environment while hosted on the ISS.

2023
The HySICS Pointing System is moved onto the baseplate at LASP
2023

June 2023

Evaluation of Payload Readiness for Delivery for Launch (Pre-Ship Review)

A review panel evaluates whether the payload has been verified to meet all functional, performance, and interface requirements, and if the project is ready to ship the payload to the ISS Payload Processing Facility at Kennedy Space Center (KSC) for final processing prior to launch.

2023
2023

September 2023

Evaluation of Readiness-to-Proceed with Prime Operations (Operational Readiness Review)

A review panel evaluates the readiness of the flight systems and associated ground systems for operations. This review ensures that all systems will comply with defined project requirements and constraints during the operations phase.

Phase E
2023
2023 – Phase E

October 2023

CPF Receives Approval to Launch (Key Decision Point-E)

This review marks approval to launch and the approval to transition from development activities to operations after completion of on-orbit check-out and commissioning period.

2023
2023

October 2023

CPF Begins Launch, Operations, and Sustainment (Phase E)

The mission conducts its prime operations. The payload will bee launched to ISS and prime operations will begin after a period of commissioning.

2023
2023

November 2023

CPF Payload Launched to ISS & Commissioning Begins

After launch and installation on the ISS, a two-month commissioning period begins. During this time, functional tests are performed for payload checkout and in preparation for prime operations.

2024
2024 – Phase E
2024 – Phase E

February 2024

CPF Begins Prime Operations

Payload commissioning activities have been completed and the project initiates regular payload operations for science data collection.

2024
2024

December 2024

Beta Level 1 and Level 4 Data Products Available

The Atmospheric Science Data Center distributes beta versions of publicly available data products.

2025
Phase F
2025 – Phase F

February 2025

CPF Begins Closeout

The mission is complete and performs close-out activities. The payload is decommissioned and the science working groups continue refining data analysis.

2025
2025

December 2025

Reprocessed Level 1 and Level 4 Data Products Available

After additional data analysis and validation, the data products will be reprocessed from the one year of prime mission operations and released to the public.