<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-19 -078 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 11 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 100%</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" >
2026.03.19 (078) 16:30:00</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">
FF202607803191630009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="9.850" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.519" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="24.811" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.800" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.800" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.200" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="205.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="205.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="103.424" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="96.472" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="6.327" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.150" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.100" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="490.000" 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="3.329" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.332" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="368.981" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.972" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.902" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="161.735" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="47.009" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="90.682" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="197.010" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.490" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
205.000 205.000 210.000 215.000 220.000 229.000 238.000 247.000 256.000 265.000 275.000 280.000 285.000 290.000 295.000 300.000 305.000 310.000 315.000 315.000 320.000 325.000 325.000 325.000 327.500 330.000 335.000 335.000 340.000 340.000 341.000 342.000 343.000 344.000 345.000 350.000 350.000 350.000 350.000 350.000 350.000 352.500 355.000 355.000 357.500 360.000 360.000 362.500 365.000 367.500 370.000 372.500 375.000 375.000 377.500 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 425.000 425.000 430.000 430.000 435.000 435.000 440.000 440.000 445.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 475.000 475.000 480.000 480.000 485.000 490.000 490.000 490.000 500.000 505.000 510.000 515.873 522.427 529.787 538.113 547.608 558.536 571.249 586.222 604.118 625.883 652.927 687.434
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 51 0 0 51 0 0 0 0 54 54 54 0 0 48 48 48 0 48 48 0 54 54 51 0 51 54 54 54 57 0 51 0 0 48 0 0 0 0 51 45 0 57 54 0 63 60 0 0 0 0 0 57 66 54 60 51 57 63 54 60 51 60 63 63 54 63 57 63 60 66 66 60 69 66 69 66 66 69 66 66 66 60 54 60 57 63 60 54 63 57 63 60 57 60 60 60 60 57 57 57 57 60 60 60 54 57 54 54 48 48
</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 0.390625 0.390625 0.390625 -1.953125 0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="5">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.8 2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
103.424 103.883 104.373 104.900 105.467
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 54 0 0 51
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -0.390625 2.734375 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 96.472 98.272 100.0 100.071 101.871 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 368.981 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.925 3.01 2.899 2.899 2.899 3.01 3.089 3.216 3.343 3.471 3.599 3.727 3.856 3.985 4.115 4.245 4.376 4.507 4.64 4.773 4.907 5.042 5.178 5.315 5.453 5.593 5.733 5.875 6.019 6.163 6.309 6.456 6.605 6.754 6.905 7.057 7.21 7.364 7.518 7.673 7.828 7.982 8.136 8.289 8.44 8.589 8.734 8.876 9.013 9.143 9.267 9.382 9.487 9.581 9.663 9.731 9.785 9.823 9.845 9.85 9.85 9.846 9.836 9.821 9.801 9.776 9.746 9.711 9.672 9.629 9.582 9.531 9.477 9.419 9.358 9.294 9.228 9.158 9.087 9.013 8.936 8.858 8.778 8.696 8.613 8.529 8.443 8.356 8.267 8.178 8.089 7.998 7.907 7.816 7.724 7.631 7.539 7.446 7.353 7.261 7.168 7.076 6.983 6.891 6.799 6.708 6.617 6.526 6.436 6.347 6.258 6.169 6.081 5.994 5.908 5.822 5.737 5.653 5.57 5.487 5.405 5.324 5.244 5.164 5.086 5.008 4.932 4.856 4.781 4.707 4.634 4.561 4.49 4.419 4.35 4.281 4.213 4.146 4.08 4.015 3.951 3.888 3.825 3.764 3.703 3.643 3.584 3.526 3.469 3.412 3.356 3.302 3.248 3.194 3.142 3.09 3.039 2.989 2.94 2.891 2.844 2.797 2.75 2.705 2.66 2.615 2.572 2.529 2.487 2.445 2.405 2.364 2.325 2.286 2.248 2.21 2.173 2.137 2.101 2.065 2.031 1.996 1.963 1.93 1.897 1.865 1.834

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="96.472" Num="3" Error="2.753">
-9.555 4.022 -0.939
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="9.85" PeakHeight="368.981" Num="5" zHalfNm="246.972" Error="5.187">
-236.295 -40.594 9.868 0.207 -0.296
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.399" Depth="0.111"/>
<TopsideChapman PeakHeight="368.981" PeakDensity="1203753.1" PeakScaleHeight="90.682" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
