Transport integrals between phi ranges

Scripts (I think):

• combine_glider_crosstrack_700m_plussfc.jnlb (make individual sections including z-integrals)
• combine_glider_crosstrack_700m_plussfc_transport_fn_of_phi2.jnlb (calc alongtrack integrals)
• rewrite_combine_glider_crosstrack_700m_plussfc_transport_fn_of_phi.jnlb (put on time axis)
• plot_combine_glider_crosstrack_700m_plussfc_transport_fn_of_phit_various.jnlb (transport)
• plot_combine_glider_crosstrack_700m_plussfc_transport_fn_of_phit_various_sfc.jnlb (surface estimates)
• combine_glider_crosstrack_700m_plussfc_transport_fn_of_phit_EorWbound.jnlb (final 2 plots below)

1. Transport estimated via phi:  Total     phi=0.1-0.9     phi=0.2-0.8     phi=0.3-0.7     phi=0.4-0.6    
2. Surface estimated transport:  Total     phi=0.1-0.9     phi=0.2-0.8     phi=0.3-0.7     phi=0.4-0.6    
3. Eastbound   vs   Westbound sections.