<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-04 -063 17:40:00.000"
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: 85% PACIFIC flags: Multiple candidates for F2x cusp, One of F2 cusps was derived from the other</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" >
2026.03.04 (063) 17:40:00</StartTime>
<SolarTerrestrialData>
<GyroFrequency Val="0.63" Model="IGRF 3.0" Altitude="300"/>
<DipAngle Val="-11.16" 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">
FF202606303041740009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.466" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="31.564" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="9.150" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="7.200" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="13.100" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="345.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="345.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="115.000" 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="0.550" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.650" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.154" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="7.250" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="7.250" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.249" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="375.255" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="271.641" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.301" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.850" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="137.689" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="66.706" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.522" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="179.370" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.180" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="7.200" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="113">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
350.000 345.000 348.333 351.667 355.000 355.000 355.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 370.000 370.000 370.000 370.000 372.000 374.000 376.000 378.000 380.000 385.000 386.667 388.333 390.000 390.000 390.000 390.000 392.500 395.000 395.000 395.000 397.500 400.000 400.000 405.000 405.000 405.000 407.500 410.000 410.000 415.000 415.000 415.000 420.000 420.000 420.000 422.500 425.000 425.000 430.000 430.000 430.000 432.500 435.000 437.500 440.000 440.000 440.000 440.000 440.000 442.500 445.000 447.500 450.000 450.000 450.000 450.000 455.000 460.000 460.000 462.500 465.000 467.500 470.000 472.500 475.000 477.500 480.000 482.500 485.000 480.000 487.500 495.000 495.000 495.000 495.000 502.500 510.000 510.000 515.000 515.000 520.000 525.000 527.500 530.000 535.000 540.000 545.000 545.000 550.000 555.000 558.903 563.320 568.361 574.168 580.930 588.903 598.444 610.069
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 54 0 0 63 66 66 63 66 66 60 63 66 54 57 63 66 60 57 0 54 0 0 63 60 0 0 54 60 69 63 0 63 66 66 60 60 60 63 66 63 0 60 69 57 0 63 60 60 60 51 60 57 54 57 60 45 54 0 51 0 0 54 54 0 0 0 51 54 0 51 0 48 48 0 0 0 0 0 0 0 45 0 48 54 0 42 51 0 51 0 42 51 48 51 51 48 0 48 48 48 48 51 0 48 48 48 45 45 48 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 0.390625 0.390625 0.390625 0.390625 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 -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 2.734375 0.390625 -2.734375 0.390625 -1.171875 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 -1.953125 -0.390625 0.390625 0.390625 2.734375 0.390625 1.953125 0.390625 -2.734375 0.390625 0.390625 0.390625 -2.734375 -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 1.171875 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="107">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 9.15
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 130.000 128.333 126.667 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 120.000 120.000 120.000 120.000 120.000 115.000 120.000 120.000 120.556 121.111 121.667 122.222 122.778 123.333 123.889 124.444 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 45 0 0 51 48 57 57 60 63 63 0 63 0 63 0 63 63 0 66 63 0 0 0 60 57 0 0 0 0 0 63 63 0 0 0 0 0 0 0 0 69 72 72 72 72 69 69 69 0 69 72 0 0 0 0 75 78 81 72 72 0 0 0 0 0 0 0 0 0 0 0 0 0 0 51 45 48 48 48 48 51 48 0 48 48 51 51 54 57 54 57 54 57 54 54 57 54 54 57 51 51 54 45 0 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</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" >
89.52 90.0 95.0 100.0 105.0 110.0 112.54 115.0 115.08 117.62 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 375.255 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.238 2.121 2.73 3.051 3.154 3.032 3.032 3.032 3.154 3.252 3.458 3.661 3.863 4.062 4.26 4.456 4.65 4.843 5.035 5.225 5.414 5.602 5.79 5.977 6.163 6.349 6.535 6.721 6.907 7.093 7.28 7.466 7.654 7.841 8.03 8.219 8.41 8.601 8.793 8.987 9.182 9.378 9.576 9.775 9.976 10.179 10.383 10.588 10.795 11.003 11.211 11.42 11.627 11.832 12.032 12.224 12.402 12.559 12.685 12.769 12.8 12.8 12.795 12.779 12.753 12.717 12.672 12.618 12.555 12.485 12.407 12.322 12.231 12.133 12.03 11.922 11.809 11.692 11.57 11.445 11.317 11.185 11.051 10.914 10.776 10.635 10.493 10.35 10.205 10.06 9.914 9.768 9.621 9.475 9.328 9.182 9.036 8.89 8.746 8.602 8.458 8.316 8.175 8.035 7.896 7.759 7.622 7.487 7.354 7.222 7.092 6.963 6.836 6.71 6.586 6.464 6.343 6.225 6.107 5.992 5.878 5.766 5.656 5.547 5.441 5.336 5.232 5.131 5.031 4.932 4.836 4.741 4.648 4.556 4.466 4.377 4.291 4.205 4.121 4.039 3.959 3.879 3.802 3.725 3.65 3.577 3.505 3.434 3.365 3.297 3.23 3.164 3.1 3.037 2.976 2.915 2.856 2.798 2.741 2.685 2.63 2.576 2.523 2.472 2.421 2.372 2.323 2.275 2.229 2.183 2.138 2.094 2.051 2.009 1.968 1.927 1.888 1.849 1.811 1.773 1.737 1.701 1.666 1.632 1.598 1.565 1.533

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.154" PeakHeight="110.0" Num="3" Error="0.0">
-30.321 12.887 -3.046
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.154" EndFrequency="12.8" PeakHeight="375.255" Num="5" zHalfNm="271.641" Error="2.353">
-219.891 -61.108 28.208 -5.26 0.416
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.62" Depth="0.122"/>
<TopsideChapman PeakHeight="375.255" PeakDensity="2032754.4" PeakScaleHeight="74.522" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
