<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 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" >
2026.03.29 (088) 10:10:00</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">
FF202608803291010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="9.100" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="3.074" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.969" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.600" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.700" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="3.750" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="9.450" 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="105.000" 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="8.450" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="355.000" 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="2.273" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="3.750" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="3.750" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="292.077" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="222.934" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="6.312" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.600" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="97.532" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="24.051" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="54.527" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="97.840" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="2.440" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="108">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.75 3.8 3.85 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
245.000 245.000 245.000 245.000 245.000 250.000 250.000 250.000 250.000 255.000 253.750 252.500 251.250 250.000 250.000 250.000 255.000 260.000 265.000 255.000 255.000 260.000 260.000 260.000 260.000 265.000 267.500 270.000 267.500 265.000 270.000 268.333 266.667 265.000 270.000 270.000 270.000 271.000 272.000 273.000 274.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 280.000 280.000 280.000 281.667 283.333 285.000 285.000 285.000 290.000 290.000 290.000 290.000 292.500 295.000 295.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 305.000 305.000 310.000 312.500 315.000 315.000 315.000 315.000 315.000 320.000 320.000 325.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 340.000 345.000 350.000 350.000 355.000 355.000 360.000 365.000 370.000 370.000 375.000 379.513 385.273 392.877 403.382 418.836 443.819 491.067 614.275
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
60 0 54 60 54 54 0 60 60 0 0 0 0 63 66 48 0 0 0 63 57 69 0 0 63 63 0 51 0 72 0 0 0 66 69 0 0 0 0 0 0 75 75 78 75 78 78 78 75 75 72 0 0 78 78 78 75 0 72 75 0 75 78 78 78 72 75 60 0 72 78 75 66 48 54 69 75 81 78 75 81 75 81 84 81 81 78 78 72 69 75 69 75 72 75 75 75 75 75 75 75 72 72 75 72 60 0 45
</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 -1.953125 1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="23">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
120.000 120.000 115.000 115.000 115.000 115.000 113.333 111.667 110.000 105.000 106.667 108.333 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
57 0 69 60 0 0 0 0 0 0 0 0 63 0 0 0 57 0 57 0 0 45 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 -1.171875 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" >
89.69 90.0 95.0 100.0 105.0 110.0 115.0 116.743 120.0 123.487 125.0 130.0 130.23 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 292.077 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.226 1.525 1.968 2.2 2.273 2.204 2.146 2.146 2.146 2.175 2.269 2.273 2.474 2.668 2.852 3.033 3.212 3.392 3.575 3.763 3.957 4.158 4.369 4.59 4.824 5.072 5.337 5.62 5.921 6.24 6.574 6.915 7.254 7.577 7.875 8.14 8.37 8.564 8.725 8.855 8.955 9.028 9.076 9.098 9.1 9.097 9.082 9.053 9.011 8.957 8.892 8.818 8.734 8.641 8.542 8.435 8.322 8.204 8.081 7.953 7.823 7.689 7.552 7.414 7.274 7.133 6.991 6.849 6.706 6.564 6.422 6.281 6.141 6.001 5.864 5.727 5.592 5.459 5.328 5.198 5.071 4.946 4.822 4.701 4.582 4.466 4.352 4.239 4.13 4.022 3.917 3.814 3.714 3.615 3.519 3.425 3.334 3.244 3.157 3.072 2.989 2.907 2.828 2.751 2.676 2.603 2.532 2.462 2.394 2.329 2.264 2.202 2.141 2.082 2.024 1.968 1.913 1.86 1.808 1.758 1.709 1.661 1.615 1.57 1.526 1.483 1.442 1.401 1.362 1.324 1.287 1.251 1.216 1.181 1.148 1.116 1.085 1.054 1.025 0.996 0.968 0.94 0.914 0.888 0.863 0.839 0.815 0.792 0.77 0.748 0.727 0.707 0.687 0.667 0.649 0.63 0.613 0.595 0.579 0.562 0.546 0.531 0.516 0.501 0.487 0.473 0.46 0.447 0.435 0.422 0.41 0.399 0.387 0.377 0.366 0.356 0.346 0.336 0.326 0.317 0.308 0.299 0.291 0.283 0.275 0.267 0.259

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.273" PeakHeight="110.0" Num="3" Error="0.0">
-29.447 11.636 -2.499
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.273" EndFrequency="9.1" PeakHeight="292.077" Num="5" zHalfNm="222.934" Error="2.838">
-152.631 -6.917 -7.857 6.463 -0.905
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="20.23" Depth="0.127"/>
<TopsideChapman PeakHeight="292.077" PeakDensity="1027419.4" PeakScaleHeight="54.527" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
