<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 22:00:00.000"
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="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 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" >
2026.02.08 (039) 22:00:00</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">
FF202603902082200009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.389" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="22.334" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.250" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="2.250" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="340.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="340.000" 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="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="515.000" 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="0.414" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="2.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="2.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="453.756" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="368.203" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.909" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="124.594" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="29.470" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="64.227" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="122.630" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.070" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="143">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 346.000 347.000 348.000 349.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 357.500 360.000 360.000 361.000 362.000 363.000 364.000 365.000 365.000 362.500 360.000 360.000 361.429 362.857 364.286 365.714 367.143 368.571 370.000 370.000 375.000 375.000 375.000 375.000 375.000 377.000 379.000 381.000 383.000 385.000 385.000 385.000 385.000 385.000 385.000 385.000 387.500 390.000 392.500 395.000 396.250 397.500 398.750 400.000 400.000 400.000 400.000 400.000 405.000 407.500 410.000 405.000 410.000 411.000 412.000 413.000 414.000 415.000 415.000 420.000 421.250 422.500 423.750 425.000 426.250 427.500 428.750 430.000 430.000 430.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 450.000 450.000 452.500 455.000 457.500 460.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 495.000 495.000 500.000 500.000 505.000 510.000 515.000 515.000 520.000 525.000 530.000 535.000 540.000 545.000 550.000 560.000 565.000 570.000 580.000 588.784 598.435 609.089 620.910 634.103 648.919 665.679
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 60 0 0 57 57 72 0 72 0 0 78 0 0 0 0 0 69 51 0 0 0 69 0 0 0 0 69 69 0 0 54 0 0 57 0 0 0 69 63 0 0 69 0 66 0 0 0 0 54 0 60 0 51 0 57 0 60 0 57 0 0 0 54 57 0 0 0 57 0 48 63 57 0 0 0 0 60 60 51 0 0 0 0 0 0 0 57 60 60 60 63 57 63 63 60 63 54 60 0 0 0 57 63 66 63 66 60 66 60 66 63 66 63 57 63 60 63 63 60 63 60 60 57 57 57 57 60 60 60 60 60 60 57 57 57 54 54 51 0 48 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -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 -1.171875 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.953125 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -0.390625 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -2.734375 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.953125 -1.171875 1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
92.484 95.0 100.0 105.0 110.0 115.0 120.0 125.0 130.0 135.0 139.11 140.0 145.0 150.0 155.0 160.0 165.0 168.221 170.0 175.0 180.0 185.0 190.0 195.0 197.331 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 453.756 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.274 0.359 0.401 0.414 0.409 0.395 0.369 0.331 0.273 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.213 0.25 0.287 0.323 0.36 0.397 0.414 0.45 0.515 0.582 0.652 0.726 0.804 0.889 0.981 1.079 1.186 1.302 1.427 1.563 1.709 1.866 2.034 2.213 2.403 2.605 2.817 3.038 3.27 3.51 3.757 4.012 4.272 4.537 4.806 5.078 5.352 5.626 5.9 6.172 6.441 6.706 6.966 7.22 7.465 7.701 7.927 8.141 8.341 8.527 8.697 8.849 8.983 9.098 9.192 9.264 9.315 9.344 9.35 9.35 9.342 9.323 9.295 9.257 9.211 9.156 9.094 9.025 8.949 8.867 8.78 8.687 8.59 8.489 8.384 8.275 8.164 8.05 7.934 7.815 7.695 7.574 7.452 7.329 7.205 7.081 6.957 6.832 6.708 6.585 6.461 6.339 6.217 6.097 5.977 5.858 5.741 5.624 5.51 5.396 5.284 5.174 5.065 4.957 4.851 4.747 4.645 4.544 4.445 4.347 4.252 4.158 4.065 3.975 3.886 3.798 3.713 3.629 3.547 3.466 3.387 3.31 3.234 3.159 3.087 3.016 2.946 2.878 2.811 2.746 2.682 2.619 2.558 2.498 2.44 2.383 2.327 2.272 2.219 2.166 2.115 2.065 2.017 1.969 1.922 1.877 1.832 1.789 1.747 1.705 1.665 1.625 1.586 1.549 1.512 1.476 1.441 1.406 1.373 1.34 1.308 1.277 1.246 1.217 1.188 1.159 1.131 1.104 1.078

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="0.414" PeakHeight="110.0" Num="3" Error="0.0">
-20.573 3.301 -0.244
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="0.414" EndFrequency="9.35" PeakHeight="453.756" Num="5" zHalfNm="368.203" Error="4.386">
-256.393 -1.284 0.352 -0.321 1.221
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="87.331" Depth="0.214"/>
<TopsideChapman PeakHeight="453.756" PeakDensity="1084646.4" PeakScaleHeight="64.227" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
