<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-29 -088 14:30:00.000"
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="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: 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" >
2026.03.29 (088) 14:30:00</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">
FF202608803291430009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="29" >
<URSI ID="00" Val="12.650" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.565" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="32.445" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="4.150" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="30" Val="4.550" Name="foEs" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.400" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.950" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="290.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="290.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="34" Val="135.000" 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="0.250" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.900" 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="3.391" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.400" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="5.400" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.361" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="367.925" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="267.461" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.945" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<Custom Name="fminEs" Val="4.150" Description="Minimum frequency of Es-layer" Units="MHz" />
<URSI ID="94" Val="134.227" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="64.754" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="74.530" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="170.150" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="146">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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 11.85 11.9 11.95 12.0 12.05 12.1 12.15 12.2 12.25 12.3 12.35 12.4 12.45 12.5 12.55 12.6 12.65
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
290.000 290.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 295.000 297.500 300.000 300.000 300.000 301.667 303.333 305.000 305.000 305.000 305.000 310.000 310.000 315.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 330.000 325.000 325.000 330.000 331.000 332.000 333.000 334.000 335.000 340.000 345.000 345.000 345.000 347.500 350.000 350.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 365.000 370.000 370.000 375.000 375.000 375.000 380.000 380.000 380.000 385.000 390.000 390.000 395.000 395.000 395.000 395.000 395.000 400.000 400.000 405.000 405.000 405.000 405.000 410.000 410.833 411.667 412.500 413.333 414.167 415.000 415.000 415.000 420.000 420.000 420.000 420.000 420.000 421.875 423.750 425.625 427.500 429.375 431.250 433.125 435.000 435.000 438.333 441.667 445.000 445.000 445.000 440.000 442.500 445.000 450.000 455.000 455.000 457.500 460.000 460.000 460.000 460.000 465.000 465.000 465.000 475.000 475.000 480.000 480.000 482.500 485.000 490.000 490.000 490.000 495.000 500.000 503.810 508.038 512.759 518.064 524.068 530.919 538.810 547.996 558.827 571.787 587.571 607.215 632.335
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 54 48 0 0 60 60 60 57 54 51 0 57 57 51 0 0 51 54 54 48 57 54 54 0 60 60 60 60 0 57 54 48 45 54 57 57 0 0 0 0 60 63 51 57 63 0 57 63 57 63 51 54 60 63 60 63 63 63 66 57 60 63 57 63 63 63 51 54 45 0 60 66 66 60 63 57 57 60 60 60 0 0 0 0 0 63 60 54 63 0 60 60 45 0 0 51 0 0 0 0 54 54 0 0 42 0 51 57 0 54 0 45 48 0 42 0 54 57 54 57 51 45 54 45 54 0 54 48 54 54 54 54 57 57 54 54 54 51 54 0 51 51 0 45 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-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 -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 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 -2.734375 -0.390625 -0.390625 -0.390625 -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
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="Es" Polarization="O" Num="9">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
4.15 4.2 4.25 4.3 4.35 4.4 4.45 4.5 4.55
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
145.000 145.000 140.000 140.000 135.000 135.000 135.000 135.000 135.000
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 51 51 54 57 57 48 45
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
-0.390625 -1.953125 -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" >
89.483 90.0 95.0 100.0 105.0 110.0 111.545 113.089 114.634 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 367.925 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.281 2.935 3.281 3.391 3.268 3.268 3.391 3.405 3.585 3.754 3.917 4.077 4.235 4.392 4.55 4.708 4.868 5.029 5.192 5.357 5.525 5.695 5.869 6.045 6.224 6.406 6.591 6.78 6.971 7.166 7.364 7.565 7.77 7.977 8.188 8.401 8.617 8.836 9.058 9.281 9.507 9.734 9.962 10.191 10.42 10.649 10.876 11.1 11.32 11.534 11.74 11.934 12.114 12.276 12.414 12.524 12.602 12.643 12.65 12.649 12.639 12.619 12.588 12.548 12.5 12.442 12.377 12.304 12.223 12.137 12.044 11.945 11.84 11.731 11.617 11.499 11.378 11.252 11.124 10.993 10.859 10.723 10.585 10.446 10.305 10.162 10.019 9.875 9.731 9.586 9.441 9.297 9.152 9.007 8.863 8.72 8.577 8.435 8.294 8.154 8.015 7.877 7.741 7.605 7.471 7.339 7.208 7.078 6.95 6.823 6.698 6.575 6.453 6.333 6.215 6.098 5.983 5.87 5.758 5.648 5.54 5.434 5.329 5.226 5.125 5.025 4.927 4.831 4.736 4.643 4.551 4.462 4.373 4.287 4.201 4.118 4.036 3.955 3.876 3.799 3.722 3.648 3.574 3.502 3.432 3.362 3.294 3.228 3.162 3.098 3.035 2.974 2.913 2.854 2.796 2.739 2.683 2.628 2.575 2.522 2.47 2.42 2.37 2.322 2.274 2.228 2.182 2.137 2.093 2.05 2.008 1.967 1.926 1.887 1.848 1.81 1.773 1.736 1.7 1.665 1.631 1.597 1.564 1.532 1.5 1.469

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.391" PeakHeight="110.0" Num="3" Error="0.0">
-30.501 13.152 -3.168
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.391" EndFrequency="12.65" PeakHeight="367.925" Num="5" zHalfNm="267.461" Error="3.012">
-213.131 -52.906 12.53 -0.527 0.743
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.634" Depth="0.123"/>
<TopsideChapman PeakHeight="367.925" PeakDensity="1985390.9" PeakScaleHeight="74.53" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
