<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-31 -304 17:00:00.000"
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) 17:00:00</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">
FF202630410311700009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="11.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.887" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.915" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="8.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="8.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="360.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="360.000" 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="0.050" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="407.337" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.175" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="8.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="8.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.259" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="310.941" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="213.157" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.800" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="133.181" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.705" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.506" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="145.680" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.820" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="51">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
360.000 360.833 361.667 362.500 363.333 364.167 365.000 365.000 367.500 370.000 370.000 371.667 373.333 375.000 375.000 375.000 375.000 375.000 375.000 376.667 378.333 380.000 380.000 380.000 380.000 380.000 381.250 382.500 383.750 385.000 390.000 390.000 395.000 396.942 399.102 401.520 404.244 407.337 410.879 414.975 419.768 425.449 432.293 440.696 451.260 464.941 483.360 509.490 549.456 618.207 764.340
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 0 66 0 0 0 0 0 0 63 63 51 66 66 66 0 0 72 66 66 63 69 0 0 0 57 63 60 60 60 0 57 54 0 0 0 0 0 0 0 0 0 0 0 0 0 0
</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 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 2.734375 -1.953125 -0.390625 -1.171875 -1.953125 1.171875 2.734375
</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" >
89.516 90.0 95.0 100.0 105.0 110.0 112.449 114.899 115.0 117.348 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 310.941 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.239 2.135 2.748 3.072 3.175 3.053 3.053 3.058 3.175 3.282 3.493 3.713 3.943 4.182 4.428 4.681 4.94 5.204 5.471 5.741 6.012 6.284 6.555 6.827 7.097 7.366 7.632 7.896 8.157 8.414 8.667 8.916 9.159 9.396 9.626 9.848 10.062 10.265 10.456 10.635 10.799 10.947 11.076 11.186 11.275 11.341 11.382 11.4 11.4 11.397 11.383 11.36 11.327 11.286 11.236 11.179 11.114 11.042 10.964 10.879 10.789 10.694 10.594 10.489 10.381 10.268 10.153 10.034 9.912 9.789 9.663 9.535 9.406 9.275 9.143 9.01 8.877 8.743 8.609 8.475 8.341 8.207 8.073 7.94 7.807 7.675 7.544 7.414 7.285 7.156 7.029 6.903 6.779 6.656 6.534 6.413 6.294 6.176 6.06 5.946 5.833 5.721 5.611 5.503 5.397 5.292 5.188 5.086 4.986 4.888 4.791 4.696 4.602 4.51 4.42 4.331 4.243 4.158 4.073 3.991 3.91 3.83 3.752 3.675 3.6 3.526 3.453 3.382 3.312 3.244 3.177 3.111 3.046 2.983 2.921 2.86 2.801 2.742 2.685 2.629 2.574 2.52 2.467 2.416 2.365 2.315 2.267 2.219 2.173 2.127 2.082 2.038 1.995 1.953 1.912 1.872 1.832 1.793 1.756 1.718 1.682 1.647 1.612 1.578 1.544 1.511 1.479 1.448 1.417 1.387 1.358 1.329 1.301 1.273 1.246 1.22 1.194 1.169 1.144 1.119 1.096 1.072 1.05 1.027 1.005 0.984 0.963

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.175" PeakHeight="110.0" Num="3" Error="0.0">
-30.338 12.911 -3.057
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.175" EndFrequency="11.4" PeakHeight="310.941" Num="5" zHalfNm="213.157" Error="3.679">
-187.372 -9.613 5.004 -1.857 0.245
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.348" Depth="0.122"/>
<TopsideChapman PeakHeight="310.941" PeakDensity="1612407.0" PeakScaleHeight="72.506" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
