<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-07 -066 17:00:00.000"
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: 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" >
2026.03.07 (066) 17:00:00</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">
FF202606603071700009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="32" >
<URSI ID="00" Val="10.550" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.498" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="26.356" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.950" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.450" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="2.950" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.360" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="10.900" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="270.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="270.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="100.900" Name="h`E" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="100.000" Name="h`Es" Units="km" QL="/" DL="/" />
<URSI ID="90" Val="97.925" Name="hmE" Units="km" QL="/" DL="/" />
<URSI ID="83" Val="7.727" Name="yE" Units="km" QL="/" DL="/" />
<URSI ID="86" Val="0.200" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="9.850" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" 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="3.272" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.050" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.305" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="357.301" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="250.817" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.090" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="3.400" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="135.197" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="46.686" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.839" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="184.830" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.170" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="3">
<Trace Type="standard" Layer="F2" Polarization="O" Num="111">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
270.000 275.000 275.000 280.000 285.000 290.000 295.000 297.500 300.000 315.000 320.000 320.000 322.500 325.000 330.000 330.000 335.000 335.000 335.000 340.000 340.000 340.000 345.000 345.000 345.000 345.000 347.500 350.000 355.000 360.000 360.833 361.667 362.500 363.333 364.167 365.000 360.000 361.667 363.333 365.000 365.000 370.000 375.000 375.000 375.000 377.500 380.000 380.000 380.000 385.000 385.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 400.000 405.000 405.000 405.000 410.000 410.000 415.000 415.000 415.000 420.000 420.000 425.000 430.000 435.000 435.000 435.000 440.000 445.000 450.000 450.000 455.000 455.000 460.000 465.000 465.000 470.000 470.000 475.000 480.000 485.000 487.500 490.000 495.000 495.000 500.000 505.000 505.000 510.000 515.000 520.000 525.000 528.841 533.073 537.757 542.970 548.808 555.390 562.867 571.436 581.355 592.970
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 54 54 45 51 48 48 0 54 48 54 48 0 54 51 54 54 51 54 60 0 48 60 60 54 60 0 60 0 60 0 0 0 0 0 54 60 0 0 69 63 63 54 0 66 0 57 63 63 57 57 0 66 72 66 66 63 69 72 72 66 57 66 72 69 72 63 69 66 66 66 0 57 48 60 63 63 54 51 54 63 60 66 63 66 63 54 54 57 54 0 54 54 48 51 51 54 51 51 45 51 0 57 48 0 42 0 0 45 42 42
</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 -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 1.171875 1.171875 1.171875 0.390625 1.171875 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 1.171875 1.171875 0.390625 1.171875 1.171875 1.171875 1.171875 0.390625 1.171875 1.171875 -2.734375 0.390625 0.390625 1.953125 0.390625 -1.171875 1.953125 0.390625 1.171875 -2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
100.900 101.576 102.324 103.161 104.111 105.216 106.540 108.206 110.486
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 0 51 0 0 0 0 0 57
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-1.171875 2.734375 -0.390625 1.171875 -1.171875 -0.390625 -0.390625 -0.390625 2.734375
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="22">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45 3.5 3.55 3.6 3.65 3.7 3.75 3.8 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
105.000 106.000 107.000 108.000 109.000 110.000 110.000 106.667 103.333 100.000 100.000 105.000 106.000 107.000 108.000 109.000 110.000 110.000 110.000 110.000 110.000 105.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
0 0 0 0 0 48 51 0 0 0 48 48 0 0 0 0 0 54 51 0 45 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 1.171875 1.171875 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 97.925 99.965 100.0 102.004 104.044 105.0 110.0 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 357.301 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 3.106 3.36 3.234 3.234 3.234 3.36 3.392 3.544 3.68 3.81 3.935 4.058 4.179 4.301 4.423 4.547 4.671 4.798 4.926 5.056 5.189 5.324 5.462 5.601 5.744 5.888 6.035 6.184 6.334 6.487 6.642 6.798 6.955 7.113 7.273 7.434 7.595 7.757 7.92 8.083 8.247 8.411 8.575 8.74 8.904 9.069 9.233 9.397 9.559 9.72 9.877 10.029 10.174 10.305 10.417 10.501 10.545 10.55 10.549 10.54 10.523 10.498 10.466 10.426 10.38 10.328 10.269 10.205 10.136 10.062 9.983 9.9 9.813 9.722 9.627 9.53 9.43 9.327 9.222 9.115 9.006 8.895 8.783 8.67 8.555 8.44 8.324 8.208 8.091 7.974 7.856 7.739 7.622 7.505 7.389 7.273 7.157 7.042 6.928 6.815 6.702 6.591 6.48 6.37 6.262 6.154 6.047 5.942 5.838 5.735 5.633 5.533 5.434 5.336 5.24 5.144 5.051 4.958 4.867 4.777 4.688 4.601 4.515 4.431 4.348 4.266 4.185 4.106 4.028 3.952 3.876 3.802 3.729 3.658 3.588 3.518 3.451 3.384 3.318 3.254 3.191 3.129 3.068 3.008 2.949 2.892 2.835 2.779 2.725 2.671 2.619 2.567 2.517 2.467 2.419 2.371 2.324 2.278 2.233 2.189 2.145 2.103 2.061 2.02 1.98 1.941 1.902 1.864 1.827 1.791 1.755 1.72 1.686 1.652 1.619 1.587 1.555 1.524 1.494 1.464 1.435 1.406 1.378 1.35 1.323 1.297 1.271

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.36" PeakHeight="97.925" Num="3" Error="1.626">
-11.776 5.069 -1.218
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.36" EndFrequency="10.55" PeakHeight="357.301" Num="5" zHalfNm="250.817" Error="5.595">
-203.319 -66.452 18.206 -3.942 2.25
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="6.119" Depth="0.126"/>
<TopsideChapman PeakHeight="357.301" PeakDensity="1380924.4" PeakScaleHeight="76.839" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
