Is Jetpack needed for installing tensorflow and opencv on Jetson Nano

Hi there,

I have a jetson Nano which I falshed the microSD card with image and logged into Ubuntu.
I would like to run a python sample code to run SSD object detection from usb camera feed which uses tensorflow and openCV.

This link is suggesting a tensorflow version for Jetson Nano:
https://devtalk.nvidia.com/default/topic/1048776/jetson-nano/official-tensorflow-for-jetson-nano-/

Do I need to install Jetpack before installing tensorflow?

And if yes, how should I do that?
I tried to follow the pdf of “JETSON NANO DEVELOPER KIT” which suggests to install SDK Manager, but the link redirects to
https://developer.nvidia.com/embedded/downloads#?search=NVIDIA%20SDK%20Manager

where it suggests to go for downloading image and following the getting started guide which is original point for “JETSON NANO DEVELOPER KIT”!? and it is a closed loop?!

Please advise how can I do this If I need to?

Thanks
Amin

NVIDIA SDK Manager URLs:
Installer: https://developer.nvidia.com/embedded/dlc/nv-sdk-manager
Instructions 1 (Download/Run): http://docs.nvidia.com/sdk-manager/download-run-sdkm/index.html
Instructions 2 (Install Software to Jetson): http://docs.nvidia.com/sdk-manager/install-with-sdkm-jetson/index.html

Note: JetPack is superceded by SDK Manager. SDKM installs to a Linux host PC. One can uncheck flash and uncheck install of tools to the host PC, and just install packages to the Jetson.