<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-10-20 -293 18:10:00.000"
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="12.0">
<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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 85% PACIFIC flags: Multiple candidates for F2x cusp, 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" >
2026.10.20 (293) 18:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.39" 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">
FF202629310201810009039031101000005012000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.524" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="23.597" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="7.200" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="395.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="395.000" 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="8.600" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="486.695" 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="2.901" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.200" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.200" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="359.606" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="235.276" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="10.192" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="163.872" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="41.606" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.555" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="191.900" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.580" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="44">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
395.000 400.000 400.000 405.000 410.000 410.000 410.000 415.000 420.000 420.000 425.000 425.000 430.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 477.554 480.333 483.367 486.695 490.361 494.418 498.934 503.990 509.690 516.165 523.585 532.172 542.226 554.158 568.549 586.243 608.529 637.459 676.525
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 54 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
</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 2.734375 0.390625 -1.953125 0.390625 0.390625 -1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 -2.734375 2.734375 0.390625 0.390625 0.390625 -0.390625 -1.953125
</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" >
89.562 90.0 95.0 100.0 105.0 110.0 113.662 115.0 117.324 120.0 120.986 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.606 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.236 1.95 2.511 2.807 2.901 2.779 2.779 2.779 2.868 2.901 3.013 3.156 3.305 3.459 3.618 3.781 3.948 4.119 4.291 4.465 4.639 4.813 4.985 5.157 5.326 5.493 5.659 5.822 5.982 6.141 6.297 6.451 6.603 6.753 6.901 7.047 7.192 7.334 7.475 7.614 7.751 7.886 8.019 8.15 8.278 8.403 8.525 8.644 8.757 8.865 8.966 9.059 9.143 9.215 9.273 9.316 9.342 9.35 9.35 9.347 9.338 9.324 9.305 9.281 9.252 9.219 9.182 9.141 9.096 9.047 8.994 8.939 8.88 8.819 8.754 8.687 8.618 8.547 8.473 8.398 8.321 8.242 8.162 8.08 7.997 7.913 7.829 7.743 7.656 7.569 7.482 7.393 7.305 7.216 7.127 7.038 6.949 6.86 6.771 6.682 6.593 6.505 6.417 6.329 6.242 6.155 6.069 5.983 5.897 5.813 5.729 5.645 5.563 5.481 5.399 5.319 5.239 5.16 5.082 5.005 4.928 4.852 4.778 4.704 4.63 4.558 4.487 4.416 4.346 4.278 4.21 4.143 4.076 4.011 3.947 3.883 3.82 3.758 3.697 3.637 3.578 3.52 3.462 3.405 3.349 3.294 3.24 3.186 3.134 3.082 3.03 2.98 2.931 2.882 2.834 2.786 2.74 2.694 2.649 2.604 2.56 2.517 2.475 2.433 2.392 2.352 2.312 2.273 2.235 2.197 2.16 2.123 2.087 2.051 2.017 1.982 1.949 1.915 1.883 1.851 1.819 1.788 1.758 1.728 1.698 1.669 1.641

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.901" PeakHeight="110.0" Num="3" Error="0.0">
-30.111 12.578 -2.905
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.901" EndFrequency="9.35" PeakHeight="359.606" Num="5" zHalfNm="235.276" Error="1.736">
-222.503 -27.093 16.267 -6.345 1.054
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="10.986" Depth="0.122"/>
<TopsideChapman PeakHeight="359.606" PeakDensity="1084646.4" PeakScaleHeight="89.555" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
