<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 12:10:00.000"
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="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" >
2026.03.23 (082) 12:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.18" 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">
FF202608203231210009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.808" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="34.114" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.100" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.250" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="280.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="280.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" Name="h`Es" 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="11.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="430.000" 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="3.068" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.207" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="324.218" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="241.863" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.186" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="111.707" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="49.184" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.543" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="136.800" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.380" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="135">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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 10.45 10.5 10.55 10.6 10.65 10.7 10.75 10.8 10.85 10.9 10.95 11.0 11.05 11.1 11.15 11.2 11.25 11.3 11.35 11.4 11.45 11.5 11.55 11.6 11.65 11.7 11.75 11.8 11.85 11.9 11.95 12.0 12.05 12.1 12.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 285.000 290.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 300.000 305.000 300.000 300.000 300.000 305.000 307.500 310.000 310.000 310.000 310.000 310.000 310.000 315.000 316.667 318.333 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 347.500 350.000 350.000 352.500 355.000 355.000 355.000 355.000 355.000 357.500 360.000 360.000 362.500 365.000 365.000 367.500 370.000 370.000 370.000 375.000 375.000 375.000 370.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 385.000 385.000 390.000 391.250 392.500 393.750 395.000 395.000 395.000 400.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 430.000 440.000 440.000 444.100 448.819 454.309 460.776 468.504 477.904 489.583 504.486 524.159 551.332
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 60 63 63 60 63 63 63 63 63 0 0 0 63 60 63 63 60 63 60 57 54 51 63 63 66 63 66 66 66 63 60 57 54 0 54 60 0 57 60 48 54 57 60 63 63 60 63 0 0 60 66 66 60 60 63 54 57 60 63 54 57 60 60 54 57 60 63 51 60 63 48 54 57 0 51 57 57 63 57 54 60 60 51 57 57 0 51 57 57 45 51 54 60 51 54 0 42 48 0 0 0 54 51 0 0 0 54 0 48 51 0 45 51 42 48 51 48 45 48 45 51 42 48 48 0 51 0 48 54 51 0 48 0 42
</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 -0.390625 0.390625 -0.390625 0.390625 -0.390625 -1.171875 -1.171875 -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 -1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="24">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 57 51 0 54 57 57 54 51 54 54 63 60 57 0 60 57 54 0 0 0 57 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
</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" >
89.535 90.0 95.0 100.0 105.0 110.0 112.915 115.0 115.831 118.746 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 324.218 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.237 2.063 2.655 2.968 3.068 2.946 2.946 2.946 3.068 3.13 3.356 3.565 3.765 3.961 4.155 4.35 4.545 4.743 4.943 5.147 5.355 5.567 5.783 6.004 6.23 6.461 6.697 6.938 7.184 7.436 7.692 7.954 8.22 8.49 8.763 9.04 9.319 9.599 9.879 10.158 10.432 10.7 10.959 11.205 11.434 11.641 11.819 11.964 12.071 12.133 12.15 12.15 12.14 12.115 12.076 12.024 11.96 11.885 11.799 11.702 11.597 11.484 11.363 11.234 11.1 10.96 10.815 10.665 10.512 10.355 10.195 10.033 9.869 9.704 9.537 9.369 9.2 9.032 8.863 8.695 8.528 8.361 8.195 8.03 7.867 7.705 7.545 7.386 7.23 7.075 6.922 6.772 6.623 6.477 6.333 6.191 6.052 5.915 5.78 5.648 5.518 5.391 5.266 5.144 5.023 4.906 4.79 4.677 4.567 4.458 4.352 4.248 4.146 4.047 3.95 3.854 3.761 3.67 3.582 3.495 3.41 3.327 3.246 3.166 3.089 3.013 2.939 2.867 2.797 2.728 2.661 2.595 2.531 2.469 2.408 2.348 2.29 2.234 2.178 2.124 2.072 2.02 1.97 1.921 1.873 1.827 1.781 1.737 1.694 1.652 1.611 1.57 1.531 1.493 1.456 1.42 1.384 1.35 1.316 1.283 1.251 1.22 1.189 1.16 1.131 1.102 1.075 1.048 1.022 0.996 0.971 0.947 0.923 0.9 0.878 0.856 0.834 0.813 0.793 0.773 0.754 0.735 0.717 0.699 0.681 0.664 0.647

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.068" PeakHeight="110.0" Num="3" Error="0.0">
-30.251 12.785 -2.999
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.068" EndFrequency="12.15" PeakHeight="324.218" Num="5" zHalfNm="241.863" Error="2.418">
-178.288 -36.858 8.742 0.515 0.417
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="8.746" Depth="0.122"/>
<TopsideChapman PeakHeight="324.218" PeakDensity="1831544.6" PeakScaleHeight="61.543" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
