<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 17:40:00.000"
URSICode="SAA0K"
StationName="SaoLuis"
GeoLatitude="-2.6"
GeoLongitude="315.8"
Source="Ionosonde"
SourceType="DPS-4"
ScalerType="auto">
<SystemInfo UMLStationID="903">
<FrequencyStepping StartFrequency="1.0" StopFrequency="14.0">
<LinearStepping Step="0.05" Units="MHz" />
</FrequencyStepping>
<RangeStepping StartRange="80.0" StopRange="1360.0" >
<LinearStepping Step="5.0" Units="km" />
</RangeStepping>
<AutoScaler Name="Artist5" Version="500200" ArtistFlags="2 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 90% PACIFIC flags: One of F2 cusps was derived from the other</Comments>
<ContactPerson>
<Name>Dr. Mangalathayil Ali Abdu</Name>
<Affiliation>INPE, Division of Aeronomy</Affiliation>
<Address>Av dos Astronautas, 1.758 Jd. Granja - CEP: 12227-010 Sao Jose dos Campos - SP Brasil</Address>
<Email>maabdu@dae.inpe.br</Email>
</ContactPerson>
<StartTime Format="yyyy.MM.dd (DDD) HH:mm:ss" TimeZone="Coordinated Universal Time" >
2026.10.31 (304) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.40" Model="IGRF 3.0" Altitude="300"/>
<DeclinationAngle Val="-19.74" Model="IGRF 3.0" Altitude="300"/>
<SunSpotNumber Val="-1.0" Status="predicted"/>
</SolarTerrestrialData>
<DigisondePreface Format="FF">
FF202630410311740009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="11.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.768" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="33.080" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="250.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="250.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="110.000" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="20.000" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.029" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.188" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="350.932" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="265.181" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.047" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="120.273" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.142" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="68.028" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="109.520" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.950" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="155">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.25 4.3 4.35 4.4 4.45 4.5 4.55 4.6 4.65 4.7 4.75 4.8 4.85 4.9 4.95 5.0 5.05 5.1 5.15 5.2 5.25 5.3 5.35 5.4 5.45 5.5 5.55 5.6 5.65 5.7 5.75 5.8 5.85 5.9 5.95 6.0 6.05 6.1 6.15 6.2 6.25 6.3 6.35 6.4 6.45 6.5 6.55 6.6 6.65 6.7 6.75 6.8 6.85 6.9 6.95 7.0 7.05 7.1 7.15 7.2 7.25 7.3 7.35 7.4 7.45 7.5 7.55 7.6 7.65 7.7 7.75 7.8 7.85 7.9 7.95 8.0 8.05 8.1 8.15 8.2 8.25 8.3 8.35 8.4 8.45 8.5 8.55 8.6 8.65 8.7 8.75 8.8 8.85 8.9 8.95 9.0 9.05 9.1 9.15 9.2 9.25 9.3 9.35 9.4 9.45 9.5 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95 10.0 10.05 10.1 10.15 10.2 10.25 10.3 10.35 10.4 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
250.000 255.000 260.000 265.000 270.000 275.000 280.000 285.000 285.000 285.964 286.928 287.892 288.855 289.819 290.783 291.747 292.711 293.675 294.639 295.602 296.566 297.530 298.494 299.458 300.422 301.386 302.349 303.313 304.277 305.241 306.205 307.169 308.133 309.096 310.060 311.024 311.988 312.952 313.916 314.880 315.843 316.807 317.771 318.735 319.699 320.663 321.627 322.590 323.554 324.518 325.482 326.446 327.410 328.373 329.337 330.301 331.265 332.229 333.193 334.157 335.120 336.084 337.048 338.012 338.976 339.940 340.904 341.867 342.831 343.795 344.759 345.723 346.687 347.651 348.614 349.578 350.542 351.506 352.470 353.434 354.398 355.361 356.325 357.289 358.253 359.217 360.181 361.145 362.108 363.072 364.036 365.000 370.000 370.000 370.000 370.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 375.000 380.000 380.000 380.000 380.000 385.000 385.000 387.500 390.000 390.000 390.000 390.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 440.000 445.000 448.345 452.160 456.550 461.658 467.674 474.865 483.611 494.478 508.345 526.653 551.940 589.139 649.261
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 54 54 54 0 0 51 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 48 0 0 0 0 0 57 0 0 0 0 0 0 0 0 0 0 0 0 66 0 0 66 69 69 66 66 0 0 60 0 63 69 66 63 60 66 66 60 63 0 63 57 60 60 63 63 60 63 57 57 57 57 60 60 57 51 51 60 57 57 57 57 57 57 57 54 48 0 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 1.953125 1.953125 2.734375 2.734375 2.734375 -1.171875 0.390625 1.953125 -2.734375 -2.734375 -0.390625 -1.171875 1.171875 -1.171875 1.953125 -0.390625 0.390625 -0.390625 -1.171875 -1.953125 2.734375 -1.953125 -0.390625 -2.734375 -1.953125 2.734375 -1.953125 2.734375 0.390625 1.171875 -1.171875 1.171875 -0.390625 -1.953125 -0.390625 2.734375 -1.953125 2.734375 -1.171875 -1.171875 2.734375 1.953125 1.171875 0.390625 2.734375 0.390625 2.734375 2.734375 0.390625 0.390625 0.390625 1.953125 1.171875 -1.171875 1.953125 1.171875 0.390625 1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -2.734375 -1.953125 -1.171875 2.734375 -0.390625 0.390625 -2.734375 2.734375 -1.171875 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="188">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.541 90.0 95.0 100.0 105.0 110.0 113.089 115.0 116.178 119.267 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 350.932 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.036 2.622 2.931 3.029 2.907 2.907 2.907 3.029 3.051 3.196 3.335 3.469 3.602 3.734 3.867 4.0 4.135 4.272 4.412 4.555 4.701 4.852 5.008 5.169 5.336 5.509 5.69 5.88 6.078 6.287 6.507 6.739 6.984 7.244 7.519 7.81 8.117 8.438 8.771 9.11 9.451 9.785 10.105 10.405 10.68 10.928 11.148 11.339 11.502 11.638 11.748 11.834 11.896 11.934 11.95 11.95 11.946 11.93 11.902 11.864 11.815 11.756 11.689 11.612 11.528 11.436 11.337 11.232 11.121 11.005 10.884 10.759 10.629 10.496 10.36 10.221 10.079 9.936 9.791 9.644 9.496 9.347 9.198 9.048 8.898 8.748 8.598 8.449 8.3 8.152 8.005 7.859 7.714 7.57 7.427 7.286 7.146 7.008 6.872 6.737 6.604 6.472 6.343 6.215 6.089 5.965 5.843 5.722 5.604 5.488 5.373 5.261 5.15 5.042 4.935 4.83 4.727 4.626 4.527 4.43 4.334 4.241 4.149 4.059 3.971 3.884 3.8 3.717 3.635 3.556 3.477 3.401 3.326 3.253 3.181 3.11 3.042 2.974 2.908 2.843 2.78 2.718 2.658 2.598 2.541 2.484 2.428 2.374 2.321 2.269 2.218 2.168 2.12 2.072 2.025 1.98 1.935 1.892 1.849 1.808 1.767 1.727 1.688 1.65 1.613 1.577 1.541 1.506 1.472 1.439 1.406 1.375 1.344 1.313 1.284 1.255 1.226 1.198 1.171 1.145 1.119 1.094 1.069 1.045 1.021 0.998

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.029" PeakHeight="110.0" Num="3" Error="0.0">
-30.219 12.738 -2.978
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.029" EndFrequency="11.95" PeakHeight="350.932" Num="5" zHalfNm="265.181" Error="2.552">
-198.781 -28.576 -11.786 7.818 -0.34
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="9.267" Depth="0.122"/>
<TopsideChapman PeakHeight="350.932" PeakDensity="1771743.1" PeakScaleHeight="68.028" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
