<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 16:10:00.000"
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) 16:10:00</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">
FF202608803291610009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="15.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.747" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="41.209" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.650" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="15.450" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="310.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="310.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="14.050" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="435.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.352" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.343" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="347.199" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="270.539" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.764" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="107.857" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="74.621" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="61.052" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="135.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.320" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="183">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65 12.7 12.75 12.8 12.85 12.9 12.95 13.0 13.05 13.1 13.15 13.2 13.25 13.3 13.35 13.4 13.45 13.5 13.55 13.6 13.65 13.7 13.75 13.8 13.85 13.9 13.95 14.0 14.05 14.1 14.15 14.2 14.25 14.3 14.35 14.4 14.45 14.5 14.55 14.6 14.65 14.7 14.75 14.8 14.85 14.9 14.95 15.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
310.000 310.000 310.000 310.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 325.000 326.667 328.333 330.000 330.000 330.000 330.000 330.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 335.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 345.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 350.000 355.000 352.500 350.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 355.000 360.000 360.000 365.000 363.333 361.667 360.000 360.000 360.000 360.000 360.000 360.000 360.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.000 370.556 371.111 371.667 372.222 372.778 373.333 373.889 374.444 375.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 380.000 390.000 390.000 390.000 390.000 390.000 391.667 393.333 395.000 395.000 400.000 400.000 400.000 405.000 405.000 405.000 410.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 455.000 459.258 464.039 469.448 475.617 482.716 490.975 500.702 512.328 526.467 544.036 566.452 596.044
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 60 57 51 54 54 51 51 0 0 60 57 60 60 60 57 54 48 60 63 60 60 57 60 63 0 63 0 63 0 63 66 63 57 51 0 0 66 66 63 60 57 60 60 57 60 0 0 60 60 63 66 0 66 63 66 66 63 63 69 69 0 69 69 66 66 69 66 69 72 66 69 66 63 0 63 63 0 60 63 57 0 57 60 60 60 57 54 51 51 48 57 57 45 0 0 57 54 0 54 54 0 57 0 42 0 0 48 0 0 57 57 0 0 0 0 0 0 0 0 63 48 0 54 60 0 63 0 63 0 60 0 0 54 0 0 60 57 0 0 57 57 51 57 57 51 57 60 51 57 60 54 60 63 57 63 54 60 63 60 63 60 66 63 57 63 60 60 63 63 60 60 57 57 57 54 51 51 48 0 42 42
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="25">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 48 51 0 57 60 60 60 57 57 63 0 66 66 0 66 0 63 0 0 0 0 0 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 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 2.734375
</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" >
89.49 90.0 95.0 100.0 105.0 110.0 111.706 113.413 115.0 115.119 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 347.199 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.24 2.255 2.901 3.243 3.352 3.229 3.229 3.343 3.352 3.62 3.851 4.059 4.255 4.443 4.626 4.806 4.985 5.163 5.342 5.522 5.704 5.889 6.077 6.269 6.465 6.667 6.874 7.089 7.31 7.54 7.779 8.029 8.29 8.565 8.853 9.157 9.479 9.82 10.182 10.564 10.967 11.389 11.824 12.264 12.697 13.111 13.495 13.839 14.139 14.392 14.599 14.761 14.881 14.959 14.996 15.0 14.997 14.977 14.938 14.883 14.812 14.726 14.626 14.512 14.387 14.252 14.106 13.95 13.787 13.616 13.438 13.255 13.066 12.873 12.676 12.475 12.272 12.066 11.859 11.651 11.442 11.232 11.022 10.813 10.604 10.396 10.189 9.983 9.78 9.578 9.377 9.179 8.984 8.79 8.6 8.411 8.226 8.043 7.863 7.686 7.512 7.341 7.173 7.008 6.846 6.687 6.53 6.377 6.227 6.08 5.936 5.795 5.657 5.521 5.389 5.259 5.133 5.009 4.887 4.769 4.653 4.539 4.428 4.32 4.214 4.111 4.01 3.911 3.815 3.72 3.629 3.539 3.451 3.366 3.282 3.201 3.121 3.043 2.968 2.894 2.822 2.751 2.683 2.616 2.55 2.486 2.424 2.364 2.304 2.247 2.19 2.135 2.082 2.03 1.979 1.929 1.88 1.833 1.787 1.742 1.698 1.656 1.614 1.573 1.534 1.495 1.458 1.421 1.385 1.35 1.316 1.283 1.251 1.219 1.188 1.158 1.129 1.101 1.073 1.046 1.02 0.994 0.969 0.944 0.92 0.897 0.875

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.352" PeakHeight="110.0" Num="3" Error="0.0">
-30.473 13.111 -3.148
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.352" EndFrequency="15.0" PeakHeight="347.199" Num="5" zHalfNm="270.539" Error="4.143">
-195.497 -42.841 -3.08 10.874 -1.536
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.119" Depth="0.123"/>
<TopsideChapman PeakHeight="347.199" PeakDensity="2791563.2" PeakScaleHeight="61.052" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
