<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-16 -075 21:00:00.000"
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="2 2 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 1 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" >
2026.03.16 (075) 21:00:00</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">
FF202607503162100009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.000" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.537" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="27.904" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="2.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="6.800" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.350" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.300" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="300.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="300.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="110.000" 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="10.750" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="530.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="1.280" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.350" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.350" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<URSI ID="92" Val="380.397" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="298.257" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="9.453" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="2.050" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="117.763" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="38.838" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="59.384" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="129.040" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.530" Name="B1" QL="/" DL="/" />
<URSI ID="32" Val="5.350" Name="fbEs" Units="MHz" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="114">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
300.000 300.000 300.000 301.600 303.200 304.800 306.400 308.000 309.600 311.200 312.800 314.400 316.000 317.600 319.200 320.800 322.400 324.000 325.600 327.200 328.800 330.400 332.000 333.600 335.200 336.800 338.400 340.000 340.000 341.250 342.500 343.750 345.000 345.000 350.000 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 380.000 385.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 415.000 415.000 415.000 420.000 422.500 425.000 427.500 430.000 435.000 435.000 440.000 442.857 445.714 448.571 451.429 454.286 457.143 460.000 460.000 463.889 467.778 471.667 475.556 479.444 483.333 487.222 491.111 495.000 497.500 500.000 500.000 502.500 505.000 507.500 510.000 515.000 520.000 520.000 521.667 523.333 525.000 527.500 530.000 535.931 542.396 549.469 557.241 565.820
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 54 57 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 63 0 66 69 0 0 0 69 72 69 72 75 75 81 72 72 0 72 75 75 72 72 75 75 78 75 72 69 78 81 78 81 72 72 69 75 54 57 51 57 63 60 66 60 57 0 48 0 45 54 51 51 0 0 0 0 45 0 51 57 0 0 0 0 0 0 45 0 45 0 48 51 0 51 0 57 0 48 54 0 0 54 0 54 48 0 0 0 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
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</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="96">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
2.05 2.1 2.15 2.2 2.25 2.3 2.35 2.4 2.45 2.5 2.55 2.6 2.65 2.7 2.75 2.8 2.85 2.9 2.95 3.0 3.05 3.1 3.15 3.2 3.25 3.3 3.35 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 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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.000 120.000 118.333 116.667 115.000 113.333 111.667 110.000 112.500 115.000 110.000 110.000 110.000 110.000 110.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 115.000 110.000 112.500 115.000 113.333 111.667 110.000 110.000 111.429 112.857 114.286 115.714 117.143 118.571 120.000 120.000 120.000 120.000 120.000 120.000 120.000 120.000 122.500 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 125.000 120.000 125.000 124.722 124.444 124.167 123.889 123.611 123.333 123.056 122.778 122.500 122.222 121.944 121.667 121.389 121.111 120.833 120.556 120.278 120.000 120.000 117.500 115.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
54 57 0 0 0 0 0 66 57 69 72 0 0 0 75 72 0 0 0 57 0 72 69 72 0 63 0 0 75 75 72 0 69 75 69 0 60 60 63 0 0 0 0 66 0 66 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 54 57 0 51 54 0 75
</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 1.171875 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 -1.171875 -0.390625 -0.390625 -1.171875 1.171875 -1.171875 1.171875 0.390625 0.390625 -0.390625 -0.390625 -1.171875 -0.390625 -1.171875 1.171875 -1.953125 1.171875 -1.171875 -0.390625 -1.171875 -0.390625 1.171875 0.390625 1.171875 1.171875 0.390625 -1.171875 -1.171875 1.171875 -2.734375 -0.390625 -0.390625 1.171875 -1.171875 -0.390625 0.390625 -0.390625 -0.390625 0.390625 1.171875 -0.390625 -1.953125 1.171875 2.734375 0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="187">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
90.049 95.0 100.0 105.0 110.0 115.0 120.0 123.064 125.0 130.0 135.0 136.129 140.0 145.0 149.193 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.397 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.854 1.109 1.239 1.28 1.258 1.188 1.12 1.12 1.12 1.12 1.12 1.167 1.229 1.28 1.307 1.46 1.603 1.746 1.894 2.05 2.215 2.392 2.581 2.783 2.996 3.22 3.453 3.693 3.938 4.187 4.438 4.689 4.939 5.189 5.438 5.686 5.932 6.176 6.42 6.662 6.903 7.144 7.383 7.623 7.861 8.1 8.338 8.575 8.812 9.048 9.283 9.516 9.746 9.97 10.188 10.394 10.583 10.748 10.88 10.966 11.0 11.0 10.994 10.973 10.938 10.891 10.832 10.761 10.681 10.59 10.491 10.383 10.269 10.148 10.02 9.888 9.75 9.609 9.464 9.315 9.164 9.011 8.857 8.7 8.543 8.385 8.227 8.069 7.911 7.754 7.597 7.442 7.287 7.133 6.982 6.831 6.682 6.535 6.39 6.247 6.106 5.968 5.831 5.696 5.564 5.434 5.306 5.181 5.058 4.937 4.819 4.703 4.59 4.478 4.369 4.263 4.158 4.056 3.956 3.858 3.762 3.669 3.578 3.488 3.401 3.316 3.233 3.151 3.072 2.994 2.919 2.845 2.773 2.702 2.634 2.567 2.502 2.438 2.376 2.315 2.256 2.198 2.142 2.087 2.033 1.981 1.93 1.881 1.833 1.785 1.739 1.695 1.651 1.609 1.567 1.527 1.487 1.449 1.412 1.375 1.34 1.305 1.271 1.238 1.206 1.175 1.145 1.115 1.086 1.058 1.031 1.004 0.978 0.953 0.928 0.904 0.881 0.858 0.836 0.814 0.793 0.772 0.752 0.733 0.714 0.695

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="1.28" PeakHeight="110.0" Num="3" Error="0.0">
-27.537 9.169 -1.583
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="1.28" EndFrequency="11.0" PeakHeight="380.397" Num="5" zHalfNm="298.257" Error="5.668">
-213.211 -33.454 22.676 -10.917 3.702
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="39.193" Depth="0.16"/>
<TopsideChapman PeakHeight="380.397" PeakDensity="1501240.8" PeakScaleHeight="59.384" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
