NCO, short for netCDF Operators, is a suite of command-line tools for inspecting, transforming and analysing scientific data stored in netCDF-accessible formats. You run a focused operator such as ncks or ncra with input and output files, then combine commands in a shell script when you need a repeatable workflow.
What NCO does
NCO is a collection of standalone shell programs, not a graphical data-analysis application. Each operator takes netCDF input, performs a task and can write a processed file. The official guide describes examples such as averaging, hyperslabbing (selecting a subset of data) and renaming; the suite also supports deriving data, calculating statistics, printing data and editing metadata. See the NCO User Guide and the NCO project repository.
As an Amazon Associate I earn from qualifying purchases.
That makes NCO useful when you want to carry out a well-defined operation on scientific array data from the shell, either interactively or as part of a scripted pipeline. Climate-model processing is a familiar use case, but the guide presents NCO as general-purpose software for netCDF data rather than a climate-only tool. The project homepage gives an overview of its scope.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Choose an operator by the task
Start with the change you want to make, then consult the guide for the operator’s exact options and assumptions. These are examples of task-to-tool matches, not complete commands; file names, variable names, dimensions and options depend on your dataset.
#1 Best Overall
- Read Before You Buy — No Video Output: These adapters support charging and USB 2.0 data transfer, but cannot transmit video signals. Except for standard USB webcams (which use USB data only), they are not compatible with HDMI/DisplayPort cables, video-capable USB-C hubs, or docking stations with video output.
- Convert USB-A Ports to USB-C: Designed to connect USB-C earphones, cables, flash drives, card readers, and other USB-C accessories to standard USB-A ports. Plug-and-play with no drivers or software required.
- Aluminum Alloy Housing: Built with a sturdy aluminum alloy shell that aids in heat dissipation and protects against daily wear and scratches. Designed to maintain a stable and secure connection.
- Compact & Travel-Friendly: The ultra-compact design allows the adapter to stay plugged into your device without blocking adjacent ports or adding bulk, reducing wear and tear on your original USB ports.
- 12-Month Warranty: Backed by a 12-month manufacturer warranty for peace of mind. Designed to meet strict quality control standards for reliable everyday performance.
| Your task | Operator to investigate | What it is used for |
|---|---|---|
| Select or inspect data | ncks |
Selection and related operations on netCDF data |
| Average record data | ncra |
Record averaging |
| Compute a weighted average | ncwa |
Weighted averaging |
| Rename variables or dimensions | ncrename |
Renaming |
For example, someone asking how to turn hourly air-temperature data into daily means needs to establish which dimension represents time, how records are arranged, and whether the desired mean should be weighted. The relevant NCO averaging operator and its options depend on those details; the operator name alone is not a complete recipe. Follow the current guide’s syntax and caveats before applying a command to important data.
What formats can NCO handle?
The project describes NCO as working with netCDF-accessible formats that include DAP, HDF4, HDF5 and Zarr. That is a project-level capability description, not a promise that every build and operator handles every format in the same way. The User Guide says netCDF is required, explains that a netCDF4-enabled NCO can handle netCDF3 and netCDF4/HDF5 data, and notes that HDF4 support depends on linking against a netCDF library built with HDF4 support. It also describes format behavior and exceptions across operators. Consult the format and operator notes in the guide for the relevant case.
Rank #2
- 5-in-1 USB-C Hub: Experience comprehensive connectivity featuring a Power Delivery input, two USB-A 2.0 ports, a USB-A 3.0 port, and an HDMI port. (Note: The USB-C power delivery input port is only for connecting an external wall charger to power your laptop and cannot power peripheral devices.)
- 90W Pass-Through Charging: Achieve optimal charging with 90W pass-through power to your laptop, supported by a total input of 100W, with the hub reserving 10W for operational efficiency. (Note: Wall charger not included.)
- Quick Data Transfers: Accelerate your productivity with rapid data transfers using a high-speed 5Gbps USB 3.0 port and two 480Mbps USB 2.0 ports.
- 4K HDMI Display: Enhance your visual experience with a hub capable of delivering 4K resolution at 30Hz in both mirror and extend modes. Please note that this hub is compatible with MacBook (macOS 12 and newer), Windows 10 and 11, ChromeOS, and laptops equipped with DP Alt Mode and Power Delivery. Note: This device is not compatible with Linux.
- What You Get: Anker USB-C Hub (5-in-1, 4K HDMI), welcome guide, 18-month warranty, and our friendly customer service.
Do not infer compatibility from a file extension alone. Check the installed NCO and netCDF versions, the features of the linked libraries, and the documentation for the operator you plan to use. Output format can depend on the input and the operator.
Outdated Drivers Are Slowing You Down
One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchPC Slower Than It Used to Be?
A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11How to approach an NCO workflow
- Define the transformation. Decide whether you need to subset variables or dimensions, aggregate records, derive a field, combine or compare files, or adjust metadata.
- Check your setup. Confirm that netCDF is installed and identify your NCO version and build features. Instructions may differ across environments.
- Find the matching operator. Use the current guide to check its syntax, supported inputs and behavior for the dimensions and variables in your files.
- Specify inputs and output deliberately. Supply the required files and options, and ensure the output path and format are appropriate for the next stage of your workflow.
- Validate the result. Inspect the processed file and its metadata, and verify that the selection or calculation reflects the intended scientific operation before using it downstream.
This sequence keeps the key decisions visible: the data layout, the operation, the build’s format support and the output you intend to use. For repeated work, NCO’s one-command-per-operator model can be incorporated into shell scripts.
Rank #3
- Sleek 7-in-1 USB-C Hub: Features an HDMI port, two USB-A 3.0 ports, and a USB-C data port, each providing 5Gbps transfer speeds. It also includes a USB-C PD input port for charging up to 100W and dual SD and TF card slots, all in a compact design.
- Flawless 4K@60Hz Video with HDMI: Delivers exceptional clarity and smoothness with its 4K@60Hz HDMI port, making it ideal for high-definition presentations and entertainment. (Note: Only the HDMI port supports video projection; the USB-C port is for data transfer only.)
- Double Up on Efficiency: The two USB-A 3.0 ports and a USB-C port support a fast 5Gbps data rate, significantly boosting your transfer speeds and improving productivity.
- Fast and Reliable 85W Charging: Offers high-capacity, speedy charging for laptops up to 85W, so you spend less time tethered to an outlet and more time being productive.
- What You Get: Anker USB-C Hub (7-in-1), welcome guide, 18-month warranty, and our friendly customer service.
Which guide version should you follow?
The official User Guide documents NCO 5.4.1 and says it was last updated on 2 October 2026. That describes the guide’s version and update date; it is not an independent installation or execution test. If your installed release differs, use documentation that matches your setup and check the current guide for operator details.
Quick Recap
Best Value
- 5-in-1 Connectivity: Equipped with a 4K HDMI port, a 5 Gbps USB-C data port, two 5 Gbps USB-A ports, and a USB C 100W PD-IN port. Note: The USB C 100W PD-IN port supports only charging and does not support data transfer devices such as headphones or speakers.
- Powerful Pass-Through Charging: Supports up to 85W pass-through charging so you can power up your laptop while you use the hub. Note: Pass-through charging requires a charger (not included). Note: To achieve full power for iPad, we recommend using a 45W wall charger.
- Transfer Files in Seconds: Move files to and from your laptop at speeds of up to 5 Gbps via the USB-C and USB-A data ports. Note: The USB C 5Gbps Data port does not support video output.
- HD Display: Connect to the HDMI port to stream or mirror content to an external monitor in resolutions of up to 4K@30Hz. Note: The USB-C ports do not support video output.
- What You Get: Anker 332 USB-C Hub (5-in-1), welcome guide, our worry-free 18-month warranty, and friendly customer service.
Rank #4
- Dual Converters, Infinite Potential：Includes 2× USB C male to USB A female adapters and 2× USB A male to USB C female adapters. Perfect for a wide range of uses—tablets with Bluetooth keyboards, expand USB ports on macbook, and more. Two different converters for all your daily needs
- Next-Level 10Gbps & 3A Charging: No more slow 480Mbps, this usb to usb c adapter has a transfer speed of up to 10Gbps, allowing you to do more transferring in less time. This usb adapter fits both USB A and USB C charger, supporting up to 3A fast charging
- Upgraded Exquisite Craftsmanship: With an aluminum alloy housing and metal connector, the usbc to usb adapter is extremely durable and sturdy. Rigorously tested to withstand more than 10,000 times of plugging and unplugging, ensuring long-lasting performance
- Broad Compatible: The usb c to usb adapter widely supports all USB C/ USB A devices like laptops, tablets, cellphones, car chargers, and phone chargers. Such as compatible with MacBook Pro/Air 2023/2022, Thunderbolt 4/3 Devices,Apple MagSafe Watch 9/8/7/SE/Ultra, iPad Pro 2022/2021, Samsung Galaxy S23/S20/S10, and iPhone 17/16/15 Pro. Plug and play
- Please Note: To reach 10Gbps speed, keep the cable under 3.3 ft. For USB A Male to USB C adapters, try flipping the USB C connector. USB C Male to USB A adapters support bidirectional 10Gbps transfer within 3.3 ft
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
