<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-23 -082 14:50:00.000"
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: 90% PACIFIC flags: 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" >
2026.03.23 (082) 14:50:00</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">
FF202608203231450009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="10.350" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.454" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="25.396" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="5.750" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.850" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.650" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="320.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="320.000" 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="0.100" 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="/" />
<Custom Name="dlt foF2" Val="0.000" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.404" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.850" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.850" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.367" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="371.588" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="246.300" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.117" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="160.745" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="51.721" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="89.955" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="206.280" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.340" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="91">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 322.500 325.000 325.000 330.000 335.000 335.000 340.000 340.000 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 362.500 365.000 370.000 370.000 370.000 370.000 372.500 375.000 375.000 380.000 380.000 380.000 385.000 385.000 385.000 387.500 390.000 395.000 395.000 400.000 400.000 405.000 405.000 410.000 415.000 417.500 420.000 420.000 425.000 430.000 430.000 435.000 435.000 440.000 445.000 445.000 450.000 450.000 455.000 460.000 460.000 465.000 465.000 470.000 470.000 475.000 475.000 485.000 485.000 490.000 490.000 500.000 500.000 505.000 510.000 510.000 520.000 525.000 530.000 535.000 545.000 550.000 555.000 565.000 575.000 585.000 590.000 600.000 612.338 626.387 642.528 661.267
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 48 0 51 45 51 51 51 45 51 45 51 45 51 51 48 51 51 57 0 57 45 0 60 60 0 60 60 57 60 54 60 60 54 0 60 66 66 66 66 66 69 66 57 0 57 66 60 51 60 54 63 57 51 60 57 66 63 57 63 60 63 63 60 63 60 57 60 60 57 54 57 60 60 60 57 57 57 57 54 54 51 48 51 48 48 48 51 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 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="28">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
130.000 125.000 125.000 125.000 125.000 130.000 127.500 125.000 125.000 125.000 125.000 125.000 125.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 122.500 125.000 125.000 125.000 125.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 45 45 51 51 45 0 54 54 0 54 0 57 57 48 51 54 51 54 48 54 57 57 0 60 60 60 54
</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
</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" >
89.481 90.0 95.0 100.0 105.0 110.0 111.493 112.985 114.478 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 371.588 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.29 2.946 3.293 3.404 3.281 3.281 3.404 3.424 3.601 3.761 3.912 4.059 4.203 4.345 4.488 4.63 4.773 4.916 5.06 5.205 5.351 5.497 5.645 5.793 5.941 6.09 6.239 6.388 6.537 6.686 6.835 6.984 7.132 7.28 7.428 7.575 7.721 7.868 8.013 8.158 8.302 8.446 8.589 8.731 8.872 9.012 9.15 9.287 9.421 9.553 9.682 9.805 9.923 10.032 10.13 10.215 10.282 10.327 10.349 10.35 10.349 10.341 10.328 10.309 10.285 10.256 10.222 10.182 10.139 10.091 10.039 9.983 9.923 9.86 9.794 9.724 9.652 9.577 9.499 9.419 9.337 9.253 9.167 9.079 8.99 8.9 8.808 8.715 8.621 8.526 8.43 8.334 8.237 8.14 8.042 7.944 7.846 7.748 7.65 7.551 7.453 7.356 7.258 7.161 7.064 6.967 6.871 6.776 6.681 6.586 6.493 6.4 6.307 6.216 6.125 6.035 5.946 5.857 5.769 5.683 5.597 5.512 5.428 5.345 5.263 5.181 5.101 5.022 4.943 4.866 4.789 4.714 4.639 4.565 4.493 4.421 4.35 4.28 4.211 4.143 4.076 4.01 3.945 3.881 3.818 3.755 3.694 3.633 3.574 3.515 3.457 3.4 3.344 3.289 3.234 3.18 3.128 3.075 3.024 2.974 2.924 2.875 2.827 2.78 2.733 2.687 2.642 2.598 2.554 2.511 2.469 2.427 2.386 2.346 2.306 2.267 2.229 2.191 2.154 2.118 2.082 2.046 2.012 1.978 1.944 1.911

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.404" PeakHeight="110.0" Num="3" Error="0.0">
-30.51 13.165 -3.174
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.404" EndFrequency="10.35" PeakHeight="371.588" Num="5" zHalfNm="246.3" Error="4.008">
-224.421 -49.868 20.214 -4.753 1.718
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.478" Depth="0.123"/>
<TopsideChapman PeakHeight="371.588" PeakDensity="1329063.2" PeakScaleHeight="89.955" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
