1. Multi-band Observations
Toney Minter (for Amy Lovell)
Future GBT Instrumentation Workshop

2. Comets Simultaneous observations of parent and daughter species
H20 → OH + H+
OH has complicated excitation & hard to model
H20 sublimes from nucleus
H20 photo-dissociates in ~82000∙AU2 seconds
OH lasts ~ seconds
NH3
Sublimes from nucleus
Measures temperature of coma
H20 photo-dissociation adds velocity kick to OH
H20 & NH3 line widths → outflow velocities

3. Asteroids λ → depth probed Multi-band observations
probe different depths
Measure T vs. depth
Constraints on composition, specific heat, density, etc.

4. Transients
Rejection of RFI events
Spectral Indices, etc. vs. time

5. VLBI Geodetic observations Removal of atmospheric phases
Removal of ionospheric phases
Transients, micro-quasars, etc.

6. Optics
Frequency Selective Surface
Dual Frequency Receiver