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Path/Row Passday
003/71 May 4th-90
003/70 Jul 12th-86
003/70 Aug 8th-90
004/70 May 30th-91
004/69 Oct 2nd-90
004/69 Jun 22nd-90
005/68 Jul 26th-86
005/69 Aug 6th-90
006/67 Aug 13th-90
006/68 Aug 13th-90
006/66 May 25th-90
006/66 Aug 16th-91
006/65 Jun 13th-91
006/64 Aug 7th-88
006/63 Aug 26th-89
007/65 Jul 19th-90
007/64 Sep 18th-89
STS/26 frame 40-055
Sun Angle
40
37
40
38
53
39
40
40
43
43
43
46
42
48
51
42
54
p.m.(Shuttle Hasselblad color print)
*Thematic Mapper band 3 Mosaic of Brazilian Amazon (1:2,500,000) - (Figure 1)
*DMA Navigation Chart ONC N-25 (1:1,000,000)
*LANDSAT-MSS Planimetric Chart of Peru (1:1,000,000)
Table 2.Images and Maps.
TM frames listed above are all system corrected. The accuracy for internal measurement in those frames
is 1 pixel (30 meters) and the accuracy of absolute positioning falls within 1 kilometer in latitude and 400
meters in longitude.
cedure in such cases was:
-To select summer images with higher sun angles
or;
-To outline the river following the linemaps
available or;
-To trace the shadow of the slope in the winter
image.
The images of Peruvian Amazon are much more
simple to be selected because the dry season of the
river comes very close to the dry season of the
weather (cloud free) and so the main stream is easi-
ly draftet. However one image of the end of the rainy
days (May) shows the Ucayali low waters flowing in
the longer meanders. Cloud free images of the wet
season would show a longer Ucayli. This is not the
case for lower Amazon waters in Brazil.
477
The mouth of Negro River reaches the flooding
peak in June wich is the center of the dry season
(Soares, 1958). Cloud free images of the middle
Amazon are oftenly from June, July and August wich
means dry weather and flooding season. The
Amazon in the flooding season meanders harder
imbricately with larger margins around islands. In
these cases we have followed the longer and the larg-
er stream. To our understanding in some sections of
the Amazon as in the Japura River domain and
Matapa Island near the city of Santarem the main
stream of the wet season may be not the main stream
of the dry season.
Availability of cloud free images made just pos-
sible to analyse a dry Ucayali and a flood Amazon.
The focal point to our model and the main
attribute of the Amazon in multispectral data is the
International Archives of Photogrammetry and Remote Sensing. Vol. XXXI, Part B7. Vienna 1996