<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-30 -303 22:30:00.000"
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 44 1 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 40% PACIFIC flags: Moderate F-spread, F2x cusp not found, Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, One of F2 cusps was derived from the other, Unidentified traces above foF2</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" >
2026.10.30 (303) 22:30:00</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">
FF202630310302230009039031101000005014000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="5.900" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.672" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="15.765" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="1.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="1.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="6.350" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="370.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="370.000" 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="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="5.300" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="425.000" 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="0.354" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="435.932" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="384.942" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.182" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="75.933" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="7.434" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="39.043" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="86.970" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.130" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="80">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
1.95 2.0 2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 3.85 3.9 3.95 4.0 4.05 4.1 4.15 4.2 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
455.000 450.000 445.000 442.500 440.000 425.000 420.556 416.111 411.667 407.222 402.778 398.333 393.889 389.444 385.000 382.500 380.000 377.500 375.000 375.000 370.000 371.667 373.333 375.000 375.000 375.000 372.500 370.000 380.000 380.000 380.000 389.167 398.333 407.500 416.667 425.833 435.000 485.000 482.500 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 480.000 478.333 476.667 475.000 475.000 475.000 472.500 470.000 465.000 460.000 445.000 435.000 425.000 440.000 455.000 470.000 485.000 500.000 515.000 515.000 517.500 520.000 530.000 550.000 570.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 57 0 57 57 0 0 0 0 0 0 0 0 57 0 0 0 0 0 63 0 0 57 0 0 0 54 60 0 0 0 0 0 0 0 60 0 0 54 0 0 0 0 0 57 0 0 0 0 0 0 0 0 60 60 0 0 60 0 60 60 0 0 63 57 0 57 0 0 0 0 54 54 57 0 54 54 0 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 -1.171875 0.390625 0.390625 -0.390625 -1.171875 1.171875 -0.390625 -1.171875 1.171875 -0.390625 -0.390625 0.390625 -0.390625 -1.953125 1.171875 0.390625 -0.390625 0.390625 -0.390625 1.171875 0.390625 -1.171875 0.390625 -0.390625 -0.390625 0.390625 -1.171875 -1.953125 -1.171875 -0.390625 0.390625 1.171875 -1.953125 -2.734375 -1.171875 1.171875 0.390625 -2.734375 1.953125 1.953125 1.171875 0.390625 -1.953125 -0.390625 -2.734375 -0.390625 1.953125 -0.390625 -1.953125 -1.171875 -1.171875 -0.390625 -1.171875 1.953125 -1.171875 0.390625 -0.390625 1.953125 0.390625 2.734375 1.171875 -1.953125 -1.953125 0.390625 -1.171875 0.390625 -0.390625 -2.734375 -1.953125 -2.734375 1.953125 0.390625 -2.734375 -2.734375 1.171875 -1.953125 -0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="171">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
93.502 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 143.449 145.0 150.0 155.0 160.0 165.0 170.0 175.0 176.899 180.0 185.0 190.0 195.0 200.0 205.0 210.0 210.348 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 435.932 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.234 0.307 0.343 0.354 0.351 0.343 0.329 0.308 0.279 0.238 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.214 0.237 0.26 0.283 0.306 0.329 0.352 0.354 0.412 0.472 0.53 0.589 0.648 0.707 0.768 0.83 0.894 0.96 1.028 1.099 1.172 1.248 1.328 1.411 1.497 1.588 1.683 1.783 1.889 1.999 2.116 2.24 2.37 2.508 2.654 2.809 2.974 3.148 3.333 3.528 3.734 3.95 4.175 4.406 4.641 4.875 5.101 5.314 5.504 5.664 5.786 5.866 5.899 5.9 5.894 5.87 5.831 5.777 5.71 5.631 5.543 5.445 5.34 5.229 5.113 4.993 4.869 4.743 4.615 4.487 4.358 4.229 4.101 3.973 3.848 3.724 3.602 3.482 3.365 3.25 3.137 3.028 2.921 2.817 2.717 2.618 2.523 2.431 2.342 2.255 2.171 2.091 2.012 1.937 1.864 1.793 1.725 1.66 1.596 1.535 1.477 1.42 1.365 1.313 1.262 1.213 1.167 1.121 1.078 1.036 0.996 0.957 0.92 0.884 0.85 0.817 0.785 0.754 0.725 0.697 0.669 0.643 0.618 0.594 0.571 0.548 0.527 0.506 0.487 0.468 0.449 0.432 0.415 0.399 0.383 0.368 0.353 0.34 0.326 0.314 0.301 0.289 0.278 0.267 0.257 0.247 0.237 0.228 0.219 0.21 0.202

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.354" PeakHeight="110.0" Num="3" Error="0.0">
-18.791 2.435 -0.142
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.354" EndFrequency="5.9" PeakHeight="435.932" Num="5" zHalfNm="384.942" Error="10.719">
-189.585 -51.704 12.648 4.342 -1.285
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="100.348" Depth="0.154"/>
<TopsideChapman PeakHeight="435.932" PeakDensity="431885.84" PeakScaleHeight="39.043" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
