<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 10:10:00.000"
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" >
2026.03.15 (074) 10:10:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.17" 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">
FF202607403151010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="27" >
<URSI ID="00" Val="9.500" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.301" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.357" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.300" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.950" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.950" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="245.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="245.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="125.000" 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="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.000" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="325.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.240" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.950" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.950" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="264.682" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="216.413" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.313" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.300" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="67.199" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="18.573" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="37.620" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="80.500" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="112">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.4 9.45 9.5
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 245.000 245.000 245.000 246.000 247.000 248.000 249.000 250.000 250.000 250.000 250.000 255.000 250.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 257.500 255.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 260.000 262.500 265.000 265.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 267.500 265.000 270.000 270.000 270.000 270.000 270.000 270.000 270.000 272.500 275.000 276.667 278.333 280.000 280.625 281.250 281.875 282.500 283.125 283.750 284.375 285.000 285.000 287.500 290.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 300.000 300.000 300.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 320.000 320.000 325.000 325.000 330.000 335.000 340.000 340.000 345.000 350.000 360.000 370.000 380.000 410.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
66 0 60 51 51 63 54 54 0 0 0 0 63 63 0 63 0 57 57 54 63 66 0 0 66 66 0 66 0 0 66 0 69 69 0 72 72 72 69 66 66 63 69 0 69 0 72 72 72 69 0 66 72 0 72 72 0 0 75 72 69 75 0 75 0 0 69 0 0 0 0 0 0 45 72 75 0 66 72 72 57 63 66 69 72 60 66 69 72 69 66 69 72 66 69 72 69 72 66 69 66 69 69 63 60 69 66 66 63 63 63 57
</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 1.953125 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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 1.171875 1.171875 1.171875 1.171875 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="34">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 120.000 121.667 123.333 125.000 126.667 128.333 130.000 135.000 130.000 125.000 125.000 125.000 125.000 125.000 125.000 122.500 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 119.167 118.333 117.500 116.667 115.833 115.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 0 0 0 60 0 48 60 0 63 69 69 69 66 57 57 57 60 66 66 0 69 0 69 63 0 0 0 0 45 48 57 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 0.390625 -0.390625 1.953125 -1.953125 -0.390625 0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 0.390625 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
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="145">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.698 90.0 95.0 100.0 105.0 110.0 115.0 116.914 120.0 123.827 125.0 130.0 130.741 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 264.682 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.226 1.503 1.94 2.168 2.24 2.174 2.112 2.112 2.112 2.134 2.226 2.24 2.469 2.693 2.9 3.101 3.301 3.505 3.714 3.931 4.158 4.397 4.65 4.92 5.209 5.52 5.855 6.216 6.604 7.014 7.438 7.863 8.269 8.635 8.945 9.19 9.365 9.469 9.5 9.5 9.482 9.434 9.359 9.261 9.14 9.001 8.845 8.675 8.494 8.303 8.104 7.899 7.689 7.476 7.261 7.046 6.831 6.616 6.404 6.194 5.987 5.783 5.583 5.388 5.196 5.01 4.828 4.651 4.479 4.312 4.151 3.994 3.842 3.695 3.553 3.416 3.283 3.156 3.032 2.914 2.799 2.689 2.582 2.48 2.382 2.287 2.196 2.108 2.024 1.943 1.865 1.79 1.718 1.649 1.583 1.519 1.458 1.399 1.342 1.288 1.236 1.186 1.138 1.092 1.048 1.005 0.965 0.926 0.888 0.852 0.817 0.784 0.752 0.722 0.693 0.664 0.637 0.612 0.587 0.563 0.54 0.518 0.497 0.477 0.457 0.439 0.421 0.404 0.387 0.372 0.357 0.342 0.328 0.315 0.302 0.29 0.278 0.267 0.256 0.245 0.235 0.226 0.217 0.208

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.24" PeakHeight="110.0" Num="3" Error="0.0">
-29.406 11.578 -2.474
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.24" EndFrequency="9.5" PeakHeight="264.682" Num="5" zHalfNm="216.413" Error="2.375">
-114.655 -22.109 -1.091 4.037 -0.123
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.741" Depth="0.128"/>
<TopsideChapman PeakHeight="264.682" PeakDensity="1119727.0" PeakScaleHeight="37.62" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
