<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-02-08 -039 11:00:00.000"
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 11 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 95% PACIFIC flags: Multiple candidates for F2x cusp</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) 11:00:00</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">
FF202603902081100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="25" >
<URSI ID="00" Val="9.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.869" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.823" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.900" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.750" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="230.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="230.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="8.500" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="385.000" 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="2.631" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="322.525" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="220.111" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.991" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="144.049" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="36.288" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="79.462" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="139.760" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.560" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="1">
<Trace Type="standard" Layer="F2" Polarization="O" Num="110">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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" >
230.000 230.000 230.000 230.000 235.000 235.000 240.000 240.000 240.000 240.000 240.000 245.000 245.000 245.000 247.500 250.000 250.000 250.000 252.500 255.000 255.000 255.000 256.667 258.333 260.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 266.667 268.333 270.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 282.500 285.000 285.000 285.000 290.000 292.500 295.000 295.000 300.000 301.250 302.500 303.750 305.000 305.000 307.500 310.000 310.000 315.000 315.000 315.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 395.000 395.000 400.000 405.000 420.000 425.000 430.000 435.000 440.000 448.439 458.906 472.232 489.773 513.908 549.211 605.768 711.045
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 51 51 48 51 57 54 0 60 57 54 57 57 57 0 57 57 57 0 57 0 60 0 0 60 63 0 0 57 60 60 63 60 63 0 0 60 63 63 63 60 63 0 63 60 0 63 60 54 63 0 60 60 54 0 0 0 60 63 0 60 63 54 60 63 57 63 63 60 63 57 63 54 63 66 60 66 60 66 63 66 63 66 66 60 69 63 66 66 69 66 66 63 63 63 63 57 54 54 60 60 63 57 63 51 48 54 45 51 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 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 -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 -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" >
89.613 90.0 95.0 100.0 105.0 110.0 114.937 115.0 119.875 120.0 124.812 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.525 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.232 1.767 2.278 2.546 2.631 2.508 2.508 2.508 2.511 2.631 2.638 2.812 2.987 3.163 3.341 3.521 3.705 3.892 4.083 4.28 4.482 4.69 4.906 5.129 5.36 5.598 5.843 6.093 6.349 6.606 6.862 7.114 7.359 7.593 7.814 8.02 8.211 8.385 8.543 8.685 8.812 8.923 9.021 9.105 9.176 9.234 9.28 9.314 9.337 9.349 9.35 9.349 9.342 9.328 9.308 9.281 9.249 9.211 9.167 9.119 9.066 9.008 8.946 8.88 8.81 8.737 8.661 8.582 8.5 8.416 8.329 8.24 8.15 8.058 7.964 7.869 7.773 7.675 7.577 7.478 7.379 7.279 7.179 7.079 6.978 6.878 6.778 6.677 6.578 6.478 6.379 6.28 6.182 6.085 5.988 5.892 5.796 5.702 5.608 5.515 5.424 5.333 5.243 5.154 5.066 4.979 4.893 4.808 4.724 4.642 4.56 4.48 4.4 4.322 4.245 4.169 4.094 4.02 3.947 3.876 3.805 3.736 3.667 3.6 3.534 3.469 3.405 3.342 3.28 3.219 3.159 3.1 3.042 2.985 2.929 2.875 2.821 2.767 2.715 2.664 2.614 2.564 2.516 2.468 2.421 2.375 2.33 2.286 2.242 2.199 2.158 2.116 2.076 2.036 1.997 1.959 1.921 1.885 1.848 1.813 1.778 1.744 1.71 1.678 1.645 1.614 1.583 1.552 1.522 1.493 1.464 1.436 1.408 1.381 1.354 1.328 1.302 1.277 1.252 1.228 1.204 1.181 1.158 1.136 1.114 1.092 1.071

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.631" PeakHeight="110.0" Num="3" Error="0.0">
-29.852 12.207 -2.742
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.631" EndFrequency="9.35" PeakHeight="322.525" Num="5" zHalfNm="220.111" Error="2.549">
-202.267 10.69 -10.304 4.968 -0.8
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="14.812" Depth="0.123"/>
<TopsideChapman PeakHeight="322.525" PeakDensity="1084646.4" PeakScaleHeight="79.462" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
