<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-09 -040 13:40:00.000"
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="18.0">
<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 F2o 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" >
2026.02.09 (040) 13:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.13" 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">
FF202604002091340009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="26" >
<URSI ID="00" Val="10.400" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.573" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.757" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.600" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.700" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="315.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" 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="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="507.294" 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="3.297" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.600" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.600" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.317" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="349.575" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="247.811" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.183" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="127.622" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="42.725" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.118" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.400" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.100" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="97">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
315.000 320.000 320.000 320.000 320.000 325.000 326.667 328.333 330.000 331.667 333.333 335.000 335.000 335.000 337.500 340.000 340.000 345.000 345.000 346.250 347.500 348.750 350.000 350.000 350.000 355.000 355.000 360.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 371.250 372.500 373.750 375.000 380.000 385.000 385.000 385.000 385.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 410.000 415.000 420.000 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 465.000 470.000 470.000 472.500 475.000 475.000 475.000 480.000 485.000 485.000 490.000 490.000 495.000 495.000 495.000 498.735 502.816 507.294 512.231 517.700 523.791 530.619 538.324 547.088 557.146 568.805
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 0 54 51 51 0 48 0 0 0 54 54 51 0 51 54 54 57 0 0 0 60 60 57 63 60 60 60 0 54 60 57 57 57 0 0 0 54 0 57 57 0 0 51 60 54 60 54 63 63 66 60 48 57 57 57 54 60 57 60 63 63 63 57 60 57 60 57 48 57 63 57 60 48 60 60 63 60 48 54 48 57 54 57 54 51 54 54 54 54 45 51 51 54 51 51
</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 -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 -1.171875 -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" >
89.497 90.0 95.0 100.0 105.0 110.0 111.936 113.872 115.0 115.808 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 349.575 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.218 2.853 3.19 3.297 3.174 3.174 3.246 3.297 3.467 3.642 3.802 3.955 4.103 4.249 4.394 4.539 4.683 4.828 4.974 5.121 5.268 5.417 5.567 5.717 5.869 6.021 6.174 6.328 6.483 6.638 6.794 6.951 7.108 7.265 7.423 7.582 7.741 7.901 8.061 8.222 8.384 8.547 8.71 8.875 9.04 9.206 9.372 9.538 9.703 9.866 10.022 10.167 10.289 10.373 10.4 10.4 10.394 10.379 10.356 10.323 10.283 10.235 10.181 10.119 10.051 9.977 9.898 9.814 9.725 9.632 9.534 9.434 9.329 9.222 9.112 9.0 8.886 8.77 8.652 8.533 8.412 8.291 8.169 8.047 7.924 7.801 7.678 7.555 7.432 7.309 7.187 7.066 6.945 6.825 6.706 6.588 6.471 6.355 6.24 6.127 6.014 5.903 5.793 5.685 5.577 5.472 5.367 5.265 5.163 5.063 4.965 4.868 4.772 4.679 4.586 4.495 4.406 4.318 4.231 4.146 4.063 3.981 3.9 3.821 3.743 3.667 3.592 3.518 3.446 3.375 3.306 3.238 3.171 3.105 3.041 2.978 2.916 2.855 2.796 2.737 2.68 2.624 2.569 2.515 2.462 2.411 2.36 2.31 2.262 2.214 2.168 2.122 2.077 2.033 1.99 1.948 1.907 1.866 1.827 1.788 1.75 1.713 1.677 1.641 1.606 1.572 1.539 1.506 1.474 1.443 1.412 1.382 1.352 1.324 1.295 1.268 1.241 1.214 1.188 1.163 1.138 1.114 1.09 1.067 1.044 1.022

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.297" PeakHeight="110.0" Num="3" Error="0.0">
-30.433 13.051 -3.121
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.297" EndFrequency="10.4" PeakHeight="349.575" Num="5" zHalfNm="247.811" Error="3.379">
-190.002 -64.702 23.902 -4.73 1.765
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.808" Depth="0.123"/>
<TopsideChapman PeakHeight="349.575" PeakDensity="1341935.5" PeakScaleHeight="72.118" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
