<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-27 -086 17:30:00.000"
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 22 0 0 0 0 0 0 0 0 0 0 "/>
<Comments>AR.5002.44 Confidence: 80% PACIFIC flags: Multiple candidates for F2x cusp, Multiple candidates for F2o 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" >
2026.03.27 (086) 17:30:00</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">
FF202608603271730009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="11.800" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.583" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="30.480" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.850" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.300" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.850" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.010" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.150" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="195.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="195.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="110.710" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="99.252" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="9.046" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.100" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.250" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="495.000" 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="3.162" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.300" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.300" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.253" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="366.571" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.589" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.257" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="122.147" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.235" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="67.992" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="166.640" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.090" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="151">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
195.000 200.000 200.000 200.000 212.500 225.000 233.750 242.500 251.250 260.000 260.000 260.000 265.000 267.000 269.000 271.000 273.000 275.000 275.000 275.000 278.750 282.500 286.250 290.000 293.750 297.500 301.250 305.000 305.000 305.000 310.000 310.000 315.000 317.500 320.000 325.000 325.000 330.000 330.000 335.000 335.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 350.000 352.500 355.000 355.000 360.000 360.000 360.000 360.000 361.923 363.846 365.769 367.692 369.615 371.538 373.462 375.385 377.308 379.231 381.154 383.077 385.000 385.000 390.000 390.000 390.000 395.000 395.000 395.000 400.000 400.000 400.000 402.500 405.000 407.500 410.000 410.000 410.000 415.000 415.000 415.000 415.000 420.000 420.000 420.000 420.000 425.000 425.000 425.000 425.000 425.000 427.500 430.000 430.000 430.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 440.000 440.000 440.000 445.000 447.000 449.000 451.000 453.000 455.000 455.000 455.000 455.000 457.500 460.000 465.000 465.000 465.000 465.000 465.000 475.000 470.000 480.000 480.000 485.000 485.000 490.000 495.000 500.000 505.000 495.000 510.000 515.000 520.000 525.000 530.000 537.157 544.927 553.390 562.644 572.805 584.014
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 48 51 48 48 54 0 0 0 45 54 54 45 0 0 45 0 54 54 51 0 0 0 0 0 0 0 48 63 66 66 69 69 0 69 63 69 63 66 63 69 63 54 63 69 60 66 66 63 0 66 63 66 0 60 51 0 0 54 0 0 0 0 0 0 0 0 0 60 63 60 0 69 66 69 69 66 69 69 0 69 54 63 69 72 66 69 75 72 69 72 72 72 69 69 66 0 66 0 66 63 60 54 54 57 57 57 54 57 57 0 57 54 57 0 0 0 0 45 51 57 57 48 57 51 54 0 54 0 48 51 51 51 51 48 48 0 45 45 0 45 48 48 48 48 0 0 0 0 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 -2.734375 1.171875 0.390625 -0.390625 -0.390625 -0.390625 0.390625 -1.953125 -1.171875 2.734375 -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 -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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -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 -1.171875 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 1.171875 2.734375 -1.953125
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="4">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.85 2.9 2.95 3.0
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
110.710 111.388 112.138 112.977
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -0.390625 1.171875 2.734375
</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 99.252 100.0 101.758 104.263 105.0 106.769 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 366.571 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 2.654 3.01 3.0 2.894 2.894 2.928 3.01 3.089 3.217 3.351 3.49 3.632 3.777 3.924 4.072 4.222 4.372 4.523 4.675 4.827 4.98 5.134 5.288 5.443 5.599 5.757 5.915 6.075 6.237 6.4 6.565 6.733 6.902 7.074 7.249 7.426 7.606 7.789 7.976 8.166 8.36 8.557 8.759 8.964 9.174 9.387 9.605 9.825 10.049 10.274 10.5 10.725 10.944 11.154 11.348 11.519 11.657 11.752 11.797 11.8 11.797 11.783 11.757 11.72 11.673 11.616 11.551 11.476 11.394 11.304 11.207 11.104 10.995 10.881 10.762 10.639 10.511 10.38 10.246 10.109 9.969 9.828 9.684 9.54 9.394 9.247 9.099 8.951 8.803 8.655 8.507 8.359 8.212 8.066 7.921 7.776 7.633 7.49 7.349 7.21 7.071 6.935 6.8 6.666 6.534 6.404 6.276 6.15 6.025 5.902 5.781 5.662 5.545 5.43 5.317 5.206 5.096 4.989 4.883 4.779 4.678 4.578 4.479 4.383 4.289 4.196 4.105 4.016 3.929 3.843 3.759 3.677 3.597 3.518 3.441 3.365 3.291 3.218 3.147 3.077 3.009 2.942 2.877 2.813 2.75 2.689 2.629 2.571 2.513 2.457 2.402 2.348 2.296 2.244 2.194 2.145 2.097 2.05 2.003 1.958 1.914 1.871 1.829 1.788 1.748 1.708 1.67 1.632 1.595 1.559 1.524 1.49 1.456 1.423 1.391 1.359 1.329 1.299 1.269 1.241 1.213 1.185 1.158 1.132 1.106 1.081 1.057

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.01" PeakHeight="99.252" Num="3" Error="4.102">
-13.661 5.751 -1.342
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.01" EndFrequency="11.8" PeakHeight="366.571" Num="5" zHalfNm="274.589" Error="4.716">
-207.105 -69.149 18.286 -0.704 -1.13
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="7.517" Depth="0.116"/>
<TopsideChapman PeakHeight="366.571" PeakDensity="1727543.4" PeakScaleHeight="67.992" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
