<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 10:50:00.000"
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="1 2 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 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" >
2026.03.01 (060) 10:50:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.15" 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">
FF202606003011050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="9.950" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.956" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.416" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.100" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.450" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="2.760" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.250" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="235.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="235.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="101.848" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="105.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="98.517" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="8.345" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="380.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="2.580" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.100" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="302.081" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.069" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.933" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.100" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="109.780" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="32.504" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.253" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="121.850" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.810" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="118">
<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 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 9.55 9.6 9.65 9.7 9.75 9.8 9.85 9.9 9.95
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
235.000 235.000 235.000 240.000 245.000 245.000 250.000 250.000 250.000 255.000 255.000 255.000 255.000 255.000 255.000 260.000 260.000 260.000 260.000 265.000 265.000 265.000 265.000 265.000 265.000 270.000 270.000 270.000 270.000 270.833 271.667 272.500 273.333 274.167 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 285.000 285.000 285.000 285.000 285.000 290.000 291.667 293.333 295.000 295.000 296.667 298.333 300.000 295.000 297.500 300.000 302.500 305.000 305.000 305.000 305.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 330.000 330.000 330.000 330.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 350.000 350.000 355.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 375.000 380.000 380.000 380.000 390.000 395.000 395.000 400.000 405.000 410.000 415.000 425.000 430.000 440.000 455.000 474.657 501.808 541.746
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 57 54 0 60 63 54 60 0 48 0 60 0 60 54 63 0 66 63 63 66 66 63 63 66 66 0 66 66 0 57 0 0 0 66 60 0 0 54 63 0 0 66 66 69 69 72 69 72 0 0 60 66 0 0 54 66 0 63 0 57 63 66 72 57 60 66 51 57 63 69 51 54 63 69 69 66 72 60 66 66 69 63 66 60 66 69 63 63 66 63 69 63 54 66 69 66 72 69 69 69 66 66 63 60 54 66 66 66 66 66 63 57 57 60 54 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="7">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.45 2.5 2.55 2.6 2.65 2.7 2.75
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
101.848 102.820 103.949 105.302 107.001 109.321 113.127
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 66 0 66 0 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 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="14">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 69 0 0 63 0 0 0 0 0 0 63 0 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
</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" >
90.0 95.0 98.517 100.0 103.701 105.0 108.885 110.0 114.069 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 302.081 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.5 2.76 2.749 2.628 2.628 2.628 2.656 2.76 2.796 2.973 3.135 3.291 3.444 3.597 3.753 3.911 4.075 4.243 4.418 4.6 4.79 4.989 5.197 5.414 5.642 5.88 6.128 6.386 6.651 6.922 7.198 7.474 7.75 8.02 8.283 8.536 8.774 8.996 9.199 9.381 9.541 9.676 9.785 9.867 9.921 9.948 9.95 9.948 9.934 9.909 9.872 9.825 9.768 9.701 9.627 9.544 9.454 9.358 9.255 9.147 9.034 8.917 8.796 8.671 8.543 8.413 8.281 8.146 8.01 7.874 7.736 7.597 7.459 7.32 7.182 7.044 6.906 6.769 6.633 6.498 6.365 6.232 6.101 5.972 5.844 5.717 5.593 5.47 5.349 5.23 5.112 4.997 4.884 4.772 4.663 4.555 4.45 4.347 4.245 4.146 4.048 3.952 3.859 3.767 3.677 3.589 3.503 3.419 3.337 3.256 3.178 3.101 3.025 2.952 2.88 2.809 2.741 2.674 2.608 2.544 2.481 2.42 2.361 2.302 2.246 2.19 2.136 2.083 2.031 1.981 1.932 1.884 1.837 1.791 1.747 1.703 1.661 1.619 1.579 1.539 1.501 1.463 1.427 1.391 1.356 1.323 1.289 1.257 1.226 1.195 1.165 1.136 1.107 1.08 1.052 1.026 1.0 0.975 0.951 0.927 0.904 0.881 0.859 0.837 0.816 0.796 0.776 0.756 0.737 0.719 0.701 0.683 0.666 0.649 0.633 0.617 0.601 0.586 0.571 0.557 0.543 0.529 0.516 0.503 0.49 0.478 0.466

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.76" PeakHeight="98.517" Num="3" Error="1.411">
-12.51 5.17 -1.177
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.76" EndFrequency="9.95" PeakHeight="302.081" Num="5" zHalfNm="222.069" Error="2.331">
-167.175 -21.633 -2.272 2.294 0.774
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="15.552" Depth="0.132"/>
<TopsideChapman PeakHeight="302.081" PeakDensity="1228318.9" PeakScaleHeight="61.253" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
