<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-01 -060 20:50:00.000"
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="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" >
2026.03.01 (060) 20:50:00</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">
FF202606003012050009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.712" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.101" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.500" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="275.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="95.000" 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="10.900" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="480.855" 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="1.590" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="354.900" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="285.823" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.521" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="97.687" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="33.527" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="49.142" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="117.160" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.220" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="137">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 275.833 276.667 277.500 278.333 279.167 280.000 282.000 284.000 286.000 288.000 290.000 290.000 290.000 295.000 295.000 295.000 295.000 296.667 298.333 300.000 300.000 300.000 300.000 302.500 305.000 306.667 308.333 310.000 305.000 310.000 315.000 315.833 316.667 317.500 318.333 319.167 320.000 325.000 322.500 320.000 330.000 330.000 330.000 330.000 330.000 335.000 335.000 337.000 339.000 341.000 343.000 345.000 345.000 345.000 345.000 350.000 350.000 355.000 355.000 356.667 358.333 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 385.000 385.000 385.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 405.000 407.500 410.000 410.000 410.000 415.000 415.000 417.500 420.000 420.000 420.000 425.000 425.000 426.667 428.333 430.000 432.500 435.000 435.000 435.000 435.000 440.000 442.500 445.000 445.000 445.000 445.000 448.333 451.667 455.000 455.000 458.333 461.667 465.000 465.000 466.128 467.404 468.859 470.534 472.482 474.777 477.519 480.855 485.000 490.289 497.271 506.916
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 0 0 0 0 0 0 0 57 0 57 0 60 48 0 60 66 0 0 69 0 0 60 0 63 0 0 60 0 0 60 0 60 0 51 0 63 48 0 51 48 60 0 0 75 72 72 0 63 0 0 63 69 72 69 66 69 54 60 0 0 69 72 63 69 72 63 66 54 63 75 60 63 0 48 60 72 72 63 66 72 72 72 60 69 72 57 57 69 66 63 66 69 66 66 57 0 57 0 60 45 45 0 0 60 0 66 69 0 66 0 0 54 57 0 51 0 0 51 45 0 0 45 54 51 45 54 54 48 51 57 60 57 48 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 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -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 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 1.171875 2.734375 -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 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.953125 -1.171875 -1.171875 1.953125 -1.171875 -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 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="33">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.15 2.2 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
95.000 95.000 100.000 98.750 97.500 96.250 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 95.000 96.429 97.857 99.286 100.714 102.143 103.571 105.000 95.000 95.000 100.000 100.000 100.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
69 69 54 54 51 0 63 0 66 75 69 69 72 69 0 66 0 60 57 63 0 0 0 0 0 0 0 57 63 0 60 51 54
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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
</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" >
89.898 90.0 95.0 100.0 105.0 110.0 115.0 120.0 120.657 125.0 130.0 131.315 135.0 140.0 141.972 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 354.9 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.209 1.063 1.377 1.539 1.59 1.559 1.465 1.447 1.447 1.447 1.447 1.496 1.564 1.59 1.719 1.896 2.059 2.221 2.385 2.555 2.732 2.917 3.11 3.312 3.522 3.739 3.963 4.192 4.426 4.663 4.901 5.142 5.383 5.624 5.866 6.108 6.35 6.592 6.834 7.076 7.319 7.563 7.808 8.055 8.303 8.553 8.806 9.061 9.319 9.58 9.844 10.109 10.372 10.627 10.859 11.033 11.1 11.1 11.089 11.056 11.004 10.934 10.848 10.746 10.631 10.503 10.365 10.216 10.059 9.894 9.723 9.546 9.365 9.18 8.992 8.802 8.611 8.418 8.226 8.033 7.841 7.65 7.46 7.272 7.086 6.902 6.721 6.543 6.367 6.194 6.024 5.858 5.695 5.535 5.378 5.225 5.076 4.93 4.787 4.648 4.512 4.379 4.25 4.124 4.002 3.883 3.767 3.654 3.544 3.437 3.333 3.232 3.134 3.039 2.947 2.857 2.769 2.685 2.602 2.523 2.445 2.37 2.297 2.226 2.158 2.091 2.026 1.964 1.903 1.844 1.787 1.731 1.678 1.626 1.575 1.526 1.479 1.433 1.388 1.345 1.303 1.262 1.223 1.185 1.148 1.112 1.078 1.044 1.011 0.98 0.949 0.92 0.891 0.863 0.836 0.81 0.785 0.76 0.736 0.713 0.691 0.67 0.649 0.628 0.609 0.59 0.571 0.553 0.536 0.519 0.503 0.487 0.472 0.457 0.443 0.429 0.416 0.403 0.39 0.378 0.366 0.355 0.344 0.333 0.322 0.312 0.303

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.59" PeakHeight="110.0" Num="3" Error="0.0">
-28.325 10.142 -1.919
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.59" EndFrequency="11.1" PeakHeight="354.9" Num="5" zHalfNm="285.823" Error="3.14">
-180.694 -53.098 27.557 -10.288 3.595
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="31.972" Depth="0.143"/>
<TopsideChapman PeakHeight="354.9" PeakDensity="1528660.0" PeakScaleHeight="49.142" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
