<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-13 -072 20:10:00.000"
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 22 0 0 0 0 0 0 0 0 1 0 "/>
<Comments>AR.5002.44 Confidence: 70% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o cusp, Unidentified traces above foF2</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" >
2026.03.13 (072) 20:10:00</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">
FF202607203132010009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.150" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.759" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.758" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.450" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="3.850" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.150" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="265.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="265.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="120.000" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="461.986" 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="2.151" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.150" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.150" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="337.276" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="263.759" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.684" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.450" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="100.657" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="35.875" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="52.392" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="122.570" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.260" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="141">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
265.000 265.000 265.000 265.000 270.000 270.833 271.667 272.500 273.333 274.167 275.000 275.000 275.000 275.000 275.000 280.000 280.000 280.000 280.000 282.000 284.000 286.000 288.000 290.000 290.000 290.000 290.000 285.000 295.000 290.000 292.500 295.000 295.000 295.000 297.000 299.000 301.000 303.000 305.000 305.000 300.000 302.500 305.000 307.500 310.000 310.000 312.500 315.000 310.000 310.000 315.000 320.000 320.000 320.000 320.000 322.500 325.000 325.000 325.000 325.000 330.000 330.000 330.000 330.000 332.500 335.000 335.000 337.500 340.000 340.000 345.000 345.000 347.500 350.000 350.000 350.000 355.000 355.000 355.000 355.000 360.000 362.500 365.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.000 412.500 415.000 415.000 420.000 420.000 420.000 420.000 430.000 430.000 430.000 430.000 435.000 440.000 440.000 440.000 445.000 450.000 450.000 450.000 450.000 452.500 455.000 456.948 459.243 461.986 465.321 469.466 474.755 481.738 491.382 505.569
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 63 63 63 60 0 0 0 0 0 0 0 69 0 66 72 72 0 72 0 0 0 0 57 63 0 0 45 0 0 0 75 75 75 0 0 0 0 57 57 57 0 45 0 63 69 0 63 75 75 0 57 0 63 63 0 57 63 72 72 66 69 72 75 0 60 63 0 69 75 69 75 57 60 63 66 60 0 57 51 54 0 45 57 63 57 69 75 72 78 78 72 69 54 51 54 51 51 57 60 63 69 66 72 60 66 63 66 63 69 0 66 72 63 63 48 57 48 54 57 60 57 51 54 57 54 48 57 57 57 54 0 45 0 0 0 48 45 48 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 -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 -0.390625 -0.390625 -0.390625 -0.390625 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -0.390625 -0.390625 -0.390625 0.390625 -0.390625 1.953125 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 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 1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="29">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.000 100.000 100.000 105.000 110.000 115.000 120.000 125.000 130.000 130.000 129.286 128.571 127.857 127.143 126.429 125.714 125.000 125.000 125.000 125.000 125.000 125.000 125.000 122.500 120.000 120.000 120.000 120.000 120.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 60 60 0 0 0 0 0 60 63 0 0 0 0 0 0 60 0 66 69 69 69 72 0 60 60 69 57 63
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 -0.390625 0.390625 -1.171875 -2.734375 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
</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" >
89.72 90.0 95.0 100.0 105.0 110.0 115.0 117.388 120.0 124.776 125.0 130.0 132.164 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 337.276 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.224 1.442 1.863 2.082 2.151 2.093 2.022 2.022 2.022 2.026 2.113 2.151 2.265 2.443 2.611 2.775 2.942 3.113 3.29 3.474 3.666 3.867 4.076 4.293 4.517 4.749 4.985 5.226 5.471 5.717 5.965 6.213 6.462 6.71 6.958 7.206 7.453 7.699 7.945 8.191 8.438 8.684 8.931 9.179 9.427 9.676 9.925 10.173 10.417 10.651 10.866 11.039 11.138 11.15 11.147 11.127 11.089 11.034 10.964 10.879 10.782 10.672 10.551 10.421 10.282 10.135 9.981 9.822 9.657 9.488 9.315 9.14 8.962 8.782 8.601 8.42 8.238 8.057 7.876 7.696 7.517 7.339 7.164 6.99 6.818 6.649 6.482 6.318 6.156 5.998 5.842 5.689 5.539 5.391 5.247 5.106 4.968 4.833 4.702 4.573 4.447 4.324 4.204 4.087 3.973 3.862 3.753 3.648 3.545 3.444 3.347 3.251 3.159 3.069 2.981 2.896 2.813 2.732 2.653 2.577 2.503 2.431 2.36 2.292 2.226 2.161 2.099 2.038 1.979 1.921 1.865 1.811 1.758 1.707 1.657 1.609 1.562 1.517 1.472 1.429 1.388 1.347 1.308 1.269 1.232 1.196 1.161 1.127 1.094 1.062 1.031 1.001 0.972 0.943 0.915 0.889 0.863 0.837 0.813 0.789 0.766 0.743 0.721 0.7 0.68 0.66 0.64 0.622 0.603 0.586 0.568 0.552 0.536 0.52 0.505 0.49 0.475 0.461 0.448 0.435 0.422 0.41 0.398 0.386 0.375 0.364 0.353

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="2.151" PeakHeight="110.0" Num="3" Error="0.0">
-29.286 11.414 -2.408
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="2.151" EndFrequency="11.15" PeakHeight="337.276" Num="5" zHalfNm="263.759" Error="3.303">
-171.709 -49.38 21.006 -8.068 3.039
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="22.164" Depth="0.129"/>
<TopsideChapman PeakHeight="337.276" PeakDensity="1542462.8" PeakScaleHeight="52.392" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
