10. INSTALL THE LOW-GAIN ANTENNAS.

HST's Low-Gain Antennas (LGAs) provide omnidirectional communications for periods when the HGAs are not in touch with TDRSS and Earth. They are small antennas, which provide for wide angular coverage so they do not have to be pointed precisely. They are incapable of providing high-rate data communications which the HGAs provide.

• From Sheet A release the two small Low Gain Antennas (LGA). Bend their prongs back about 90 degrees in opposite directions. Apply glue to the prongs of one, and install it on the side of the TELESCOPE TUBE, up at the foremost edge. Set it between a 4 and 5 o'clock position as viewed looking down into the tube, if the APERTURE DOOR were at 12 o'clock. The LGA should point outward and slightly forward.

• Apply glue to the prongs of the other LGA, and set it on the AFT BULKHEAD on the letters LGA. It should point slightly outward from the center. NOTE: skip this step if you want to display your completed HST model by standing it upright on its AFT BULKHEAD.