SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549
                                 --------------

                                  SCHEDULE 13D
                                 (RULE 13d-101)

             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
            TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO
                                  RULE 13d-2(a)

                               (Amendment No. 1)1

                         APPLIED SIGNAL TECHNOLOGY, INC.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                           COMMON STOCK, NO PAR VALUE
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                    038237103
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                              STEVEN WOLOSKY, ESQ.
               OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP
                                 505 Park Avenue
                            New York, New York 10022
                                 (212) 753-7200
- --------------------------------------------------------------------------------
                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  June 29, 2001
- --------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of This Statement)

            If the filing  person has  previously  filed a statement on Schedule
13G to report the  acquisition  that is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e),  13d-1(f) or 13d-1(g),  check the
following box |_|.

            NOTE.  Schedules  filed  in  paper  format  shall  include  a signed
original and five copies of the schedule, including all exhibits. SEE Rule 13d-7
for other parties to whom copies are to be sent.


                         (Continued on following pages)

                               (Page 1 of 7 Pages)

- --------
     1      The remainder of this cover page shall be filled out for a reporting
person's  initial  filing on this  form with  respect  to the  subject  class of
securities,  and for any subsequent amendment containing information which would
alter disclosures provided in a prior cover page.

            The  information  required on the remainder of this cover page shall
not be deemed to be "filed"  for the  purpose  of  Section 18 of the  Securities
Exchange Act of 1934 or otherwise  subject to the liabilities of that section of
the Act but shall be subject to all other  provisions of the Act  (however,  SEE
the NOTES).




- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 2 of 7 Pages
- -----------------------------------             --------------------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                                      STEEL PARTNERS II, L.P.
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) |_|
                                                                         (b) |_|
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*
                     WC
- --------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 |_|
- --------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                     DELAWARE
- --------------------------------------------------------------------------------
 NUMBER OF         7      SOLE VOTING POWER
   SHARES
BENEFICIALLY                    641,166
  OWNED BY
    EACH
 REPORTING
PERSON WITH    -----------------------------------------------------------------
                   8      SHARED VOTING POWER

                                -0-
               -----------------------------------------------------------------
                   9      SOLE DISPOSITIVE POWER

                                641,166
               -----------------------------------------------------------------
                  10      SHARED DISPOSITIVE POWER

                                -0-
- --------------------------------------------------------------------------------
     11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                     641,166
- --------------------------------------------------------------------------------
     12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               |_|
- --------------------------------------------------------------------------------
     13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                     6.7%
- --------------------------------------------------------------------------------
     14        TYPE OF REPORTING PERSON*

                     PN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!






- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 3 of 7 Pages
- -----------------------------------             --------------------------------


================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                              STEEL PARTNERS SERVICES, LTD.
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) |_|
                                                                         (b) |_|
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*
                     WC
- --------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 |_|
- --------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                     NEW YORK
- --------------------------------------------------------------------------------
 NUMBER OF         7      SOLE VOTING POWER
   SHARES
BENEFICIALLY                    81,790
  OWNED BY
    EACH
 REPORTING
PERSON WITH    -----------------------------------------------------------------
                   8      SHARED VOTING POWER

                                -0-
               -----------------------------------------------------------------
                   9      SOLE DISPOSITIVE POWER

                                81,790
               -----------------------------------------------------------------
                  10      SHARED DISPOSITIVE POWER

                                -0-
- --------------------------------------------------------------------------------
     11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                     81,790
- --------------------------------------------------------------------------------
     12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               |_|
- --------------------------------------------------------------------------------
     13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                     0.9%
- --------------------------------------------------------------------------------
     14        TYPE OF REPORTING PERSON*

                     CO
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!






- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 4 of 7 Pages
- -----------------------------------             --------------------------------

================================================================================
     1         NAME OF REPORTING PERSONS
               I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)

                                  WARREN G. LICHTENSTEIN
- --------------------------------------------------------------------------------
     2         CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*         (a) |_|
                                                                         (b) |_|
- --------------------------------------------------------------------------------
     3         SEC USE ONLY

- --------------------------------------------------------------------------------
     4         SOURCE OF FUNDS*
                     OO
- --------------------------------------------------------------------------------
     5         CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
               PURSUANT TO ITEM 2(d) OR 2(e)                                 |_|
- --------------------------------------------------------------------------------
     6         CITIZENSHIP OR PLACE OF ORGANIZATION

                     USA
- --------------------------------------------------------------------------------
 NUMBER OF         7      SOLE VOTING POWER
   SHARES
BENEFICIALLY                    722,956
  OWNED BY
    EACH
 REPORTING
PERSON WITH    -----------------------------------------------------------------
                   8      SHARED VOTING POWER

                                -0-
               -----------------------------------------------------------------
                   9      SOLE DISPOSITIVE POWER

                                722,956
               -----------------------------------------------------------------
                  10      SHARED DISPOSITIVE POWER

                                -0-
- --------------------------------------------------------------------------------
     11        AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING
               PERSON

                     722,956
- --------------------------------------------------------------------------------
     12        CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
               CERTAIN SHARES*                                               |_|
- --------------------------------------------------------------------------------
     13        PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                     7.5%
- --------------------------------------------------------------------------------
     14        TYPE OF REPORTING PERSON*

                     IN
================================================================================

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!






- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 5 of 7 Pages
- -----------------------------------             --------------------------------



            The following constitutes Amendment No. 1 ("Amendment No. 1") to the
Schedule 13D filed by the undersigned.  This Amendment No. 1 amends the Schedule
13D as specifically set forth.

   Item 3 is hereby amended and restated as follows:

Item 3.          Source and Amount of Funds or Other Consideration.
                 -------------------------------------------------

                 (a) The  aggregate  purchase  price of the  641,166  Shares  of
Common  Stock  owned by Steel  Partners II is  $2,807,759.  The Shares of Common
Stock owned by Steel Partners II were acquired with partnership funds.

                 (b) The aggregate purchase price of the 81,790 Shares of Common
Stock  acquired  for the  benefit  of the Fund is  $422,058.  Such  Shares  were
acquired by Steel Partners Services with funds it manages for the Fund. Pursuant
to the  Services  Agreement  with the Fund,  Steel  Partners  Services  has been
appointed to manage,  on a  discretionary  basis,  certain of the Fund's assets,
which are  maintained  in a brokerage  account in the Fund's name.  The Services
Agreement  may be  terminated  by the  Fund  at any  time or by  Steel  Partners
Services at any time upon thirty days' advance written notice.

   The second paragraph of Item 5(a) is hereby amended and restated as follows:

                 As of the close of business on July 3, 2001,  Steel Partners II
beneficially  owned 641,166 Shares of Common Stock,  constituting  approximately
6.7% of the Shares outstanding,  and Steel Partners Services  beneficially owned
81,790 Shares of Common  Stock,  constituting  approximately  0.9% of the Shares
outstanding.  Mr. Lichtenstein  beneficially owned 722,956 Shares,  constituting
approximately 7.5% of the Shares  outstanding.  Mr. Lichtenstein has sole voting
and dispositive power with respect to the 641,166 Shares owned by Steel Partners
II and the  81,790  Shares  owned by Steel  Partners  Services  by virtue of his
authority to vote and dispose of such Shares.  All of such Shares were  acquired
in open-market transactions.

   Item 5(c) is hereby amended to add the following:

                 (c)  Schedule A annexed  hereto lists all  transactions  in the
Issuer's  Common Stock by the Reporting  Persons since the filing of the initial
Schedule 13D.





- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 6 of 7 Pages
- -----------------------------------             --------------------------------


                                   SIGNATURES


                 After  reasonable  inquiry and to the best of his knowledge and
belief, each of the undersigned certifies that the information set forth in this
statement is true, complete and correct.


Dated:  July 3, 2001                   STEEL PARTNERS II, L.P.

                                       By: Steel Partners, L.L.C.
                                           General Partner


                                       By: /s/ Warren G. Lichtenstein
                                           ---------------------------
                                           Warren G. Lichtenstein
                                           Chief Executive Officer



                                       STEEL PARTNERS SERVICES, LTD.


                                       By: /s/ Warren G. Lichtenstein
                                           ---------------------------
                                           Warren G. Lichtenstein
                                           Chief Executive Officer



                                       /s/ Warren G. Lichtenstein
                                       ------------------------------
                                       WARREN G. LICHTENSTEIN





- -----------------------------------             --------------------------------
CUSIP No. 038237103                     13D             Page 7 of 7 Pages
- -----------------------------------             --------------------------------

                                   SCHEDULE A

                   Transactions in the Shares Since the Filing
                   -------------------------------------------
                           of the Initial Schedule 13D
                           ---------------------------

Shares of Common Stock             Price Per                  Date of
       Purchased                   Share($)                   Purchase
      -----------                 ----------                 ----------

                             STEEL PARTNERS II, L.P.
                             -----------------------

       10,500                      5.18860                     6/27/01
       38,000                      5.13640                     6/28/01
       58,700                      5.11260                     6/29/01
        5,790                      5.10260                     7/02/01
       19,886                      5.08580                     7/03/01

                          STEEL PARTNERS SERVICES, LTD.
                          -----------------------------

        2,000                      5.10260                     7/02/01
        5,000                      5.08580                     7/03/01


                               WARREN LICHTENSTEIN
                               -------------------
                                      None