Remove the rind and the seeds. Chop them into chunks - to make it easy to blend.
You can use Navel or any orange really that's sweet and juicy. Peel and segment them.
P.S Can you spot the small balls of cantaloupe on the side? If you have a melon baller, you can scoop some of the cantaloupe for garnish. Its optional of course.
Add everything to the blender. You can change the proportion of orange and cantaloupe based on your preference. Add sugar as per the sweetness of the fruit. Mine were ripe and very sweet, hence I did not add any.
Blend until smooth. This will make a thick juice so add water as per preference.