EXHIBIT I
JOINT FILING AGREEMENT
In accordance with Rule 13d-1(f) under the Securities Exchange Act
of 1934, as amended, the persons named below agree to the joint filing on behalf
of each of them of a statement on Schedule 13D dated January 19, 1998 with
respect to the Common Stock, par value $.01 per share, of American Mobile
Satellite Corporation, a Delaware corporation. This Joint Filing Agreement shall
be included as an Exhibit to such joint filing. In evidence thereof each of the
undersigned, being duly authorized, hereby executes this Agreement this 19th day
of January 1998.
SINGAPORE TELECOMMUNICATIONS LTD.
By: /s/ Ho Siaw Hong
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Name: Ho Siaw Hong
Title: Assistant Vice President
(Satellite Services)
TEMASEK HOLDINGS (PRIVATE) LTD.
By: /s/ Ng Xxx Xxxx
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Name: Ng Xxx Xxxx
Title: Senior Vice President/
Company Secretary
