<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-11 -070 16:30:00.000"
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="1 2 0 0 0 0 0 0 0 44 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 45% PACIFIC flags: One of F2 cusps was derived from the other, 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" >
2026.03.11 (070) 16:30:00</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">
FF202607003111630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="9.750" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.605" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.396" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="9.900" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="6.900" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.050" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.260" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.050" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="355.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="355.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="106.084" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.822" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.632" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.300" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.550" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="510.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.334" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="6.900" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.900" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.334" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="322.680" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="215.831" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.901" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.250" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="130.851" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="37.796" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="73.273" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.750" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.120" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="6.900" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="58">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
355.000 360.000 362.000 364.000 366.000 368.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 385.000 386.667 388.333 390.000 395.000 395.000 395.000 400.000 402.500 405.000 405.000 410.000 412.500 415.000 415.000 410.000 415.000 420.000 425.000 430.000 435.000 440.000 444.167 448.333 452.500 456.667 460.833 465.000 465.000 469.000 473.000 477.000 481.000 485.000 485.000 490.000 495.000 500.000 505.000 510.000 510.000 515.000 520.000 525.000 531.358
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 0 0 0 0 48 48 0 51 45 45 54 48 0 0 51 45 51 45 54 0 51 57 54 0 48 54 45 0 57 0 0 54 54 0 0 0 57 0 51 60 0 54 0 0 51 51 54 0 51 54 48 54 57 57 51 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 0.390625 1.953125 -1.171875 0.390625 -0.390625 0.390625 2.734375 0.390625 -0.390625 0.390625 0.390625 0.390625 2.734375 2.734375 -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 0.390625 0.390625 0.390625 -0.390625 -0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.05 3.1 3.15 3.2 3.25
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
106.084 106.759 107.504 108.338 109.286
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0 0 0 48
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-2.734375 1.171875 -0.390625 2.734375 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 111.667 113.333 115.000 110.000 120.000 115.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 112.500 115.000 113.333 111.667 110.000 110.000 110.000 111.667 113.333 115.000 110.000 120.000 110.000 110.714 111.429 112.143 112.857 113.571 114.286 115.000 116.250 117.500 118.750 120.000 120.000 117.500 115.000 115.000 115.000 115.000 115.000 110.000 110.000 110.000 110.000 115.000 115.000 112.500 110.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 120.000 120.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 112.500 110.000 110.000 110.000 110.000 110.000 110.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
63 0 63 60 57 0 0 0 60 63 66 0 0 63 0 51 69 51 66 0 60 0 0 0 0 0 63 63 0 0 0 0 0 66 66 57 0 0 57 63 45 66 0 0 0 45 0 0 51 0 45 0 48 45 0 63 57 0 0 60 66 0 66 63 48 57 51 60 54 60 48 63 60 63 0 63 57 0 63 48 45 57 54 54 60 63 0 54 60 60 57 54 63 0 60 66 57 0 63 57 0 63 63 66 66 66 60 51 60 60 0 66 66 63
</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 1.171875 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 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" >
90.0 95.0 97.822 99.601 100.0 101.379 103.158 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 322.68 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.025 3.26 3.14 3.14 3.14 3.26 3.321 3.491 3.665 3.841 4.019 4.197 4.373 4.549 4.722 4.892 5.059 5.223 5.384 5.543 5.699 5.852 6.003 6.152 6.298 6.444 6.587 6.73 6.871 7.011 7.151 7.29 7.429 7.567 7.706 7.844 7.983 8.123 8.263 8.404 8.546 8.689 8.834 8.98 9.126 9.272 9.416 9.551 9.667 9.739 9.75 9.749 9.741 9.724 9.699 9.667 9.628 9.582 9.53 9.471 9.407 9.338 9.264 9.186 9.103 9.016 8.926 8.832 8.736 8.637 8.535 8.432 8.326 8.219 8.11 8.0 7.889 7.777 7.665 7.552 7.438 7.325 7.211 7.098 6.984 6.871 6.759 6.647 6.535 6.424 6.314 6.205 6.097 5.989 5.883 5.778 5.674 5.571 5.469 5.368 5.269 5.171 5.074 4.979 4.884 4.792 4.7 4.61 4.521 4.434 4.348 4.263 4.18 4.098 4.017 3.938 3.86 3.783 3.708 3.634 3.561 3.49 3.42 3.351 3.283 3.217 3.152 3.088 3.025 2.964 2.903 2.844 2.786 2.729 2.673 2.618 2.564 2.512 2.46 2.409 2.36 2.311 2.263 2.216 2.17 2.125 2.081 2.038 1.996 1.954 1.914 1.874 1.835 1.797 1.759 1.723 1.687 1.651 1.617 1.583 1.55 1.518 1.486 1.455 1.424 1.395 1.365 1.337 1.309 1.281 1.254 1.228 1.202 1.177 1.152 1.128 1.105 1.081 1.059 1.036 1.015 0.993 0.972 0.952 0.932 0.912 0.893

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.26" PeakHeight="97.822" Num="3" Error="3.083">
-11.602 4.964 -1.184
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.26" EndFrequency="9.75" PeakHeight="322.68" Num="5" zHalfNm="215.831" Error="2.292">
-182.311 -60.066 30.318 -8.467 1.004
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.336" Depth="0.12"/>
<TopsideChapman PeakHeight="322.68" PeakDensity="1179435.5" PeakScaleHeight="73.273" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
