<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-15 -074 15:10:00.000"
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 1 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" >
2026.03.15 (074) 15:10:00</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">
FF202607403151510009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="30" >
<URSI ID="00" Val="11.575" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="10" Val="5.573" Name="foF1" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.537" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="29.299" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="5.050" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="5.050" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="11.850" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="275.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="315.000" Name="h`F2" 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="0.400" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="10.950" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="505.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Custom Name="dlt foF2" Val="0.025" Description="Adjustment to the scaled foF2 during profile inversion" Units="MHz" />
<Modeled Name="foEp" Val="3.408" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="5.050" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="6.100" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.369" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="359.834" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="91" Val="193.697" Name="hmF1" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="257.260" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="8.287" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="116.487" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="95" Val="67.259" Name="yF1" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="52.887" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="72.264" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="165.330" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.300" Name="B1" QL="/" DL="/" />
<URSI ID="D2" Val="0.220" Name="D1" QL="/" DL="/" />
</CharacteristicList>
<TraceList Num="2">
<Trace Type="standard" Layer="F2" Polarization="O" Num="120">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 320.000 315.000 315.000 315.000 315.000 320.000 320.000 320.000 320.000 320.000 320.000 320.909 321.818 322.727 323.636 324.545 325.455 326.364 327.273 328.182 329.091 330.000 330.000 340.000 340.000 340.000 340.000 345.000 350.000 350.000 350.000 350.000 355.000 355.000 355.000 360.000 365.000 365.000 370.000 370.000 370.000 375.000 375.000 380.000 385.000 385.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 410.000 410.000 415.000 415.000 415.000 417.500 420.000 420.000 425.000 425.000 425.000 430.000 430.000 435.000 435.000 435.000 440.000 440.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 460.000 460.000 462.500 465.000 465.000 470.000 470.000 475.000 480.000 480.000 482.500 485.000 490.000 495.000 495.000 500.000 505.000 505.000 505.000 505.000 511.000 517.000 523.000 529.000 535.000 541.250 546.139 551.668 557.968 565.215 573.639 583.553
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 48 51 51 51 54 54 54 54 57 57 0 54 57 57 0 60 60 60 60 0 51 0 0 0 60 0 0 0 0 57 48 51 57 60 63 57 45 0 60 63 57 63 63 60 51 60 48 60 63 60 63 57 48 57 48 57 48 57 51 60 63 63 54 63 54 60 66 0 63 66 60 60 60 63 60 60 63 60 60 60 60 60 63 60 0 60 60 45 54 0 51 57 51 54 48 42 48 45 48 48 42 48 48 45 51 51 45 0 0 45 0 45 0 45 0 45 42 0 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 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 0.390625 0.390625 -0.390625 0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 1.953125 -0.390625 -1.171875 -0.390625 -0.390625 -0.390625 -0.390625 1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 -0.390625 -0.390625
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="F1" Polarization="O" Num="11">
<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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
275.000 282.500 290.000 295.000 300.000 305.000 307.500 310.000 312.500 315.000 317.500
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
45 0 45 48 48 45 0 45 0 51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625 -2.734375 -0.390625 -0.390625 -0.390625 -0.390625
</TraceValueList>
</Trace>
</TraceList>
<ProfileList Num="1">
<Profile  Algorithm="NH" AlgorithmVersion="4.33" Type="vertical" >
<Tabulated Num="189">
<AltitudeList Type="float" Units="km" Description="Altitude above station level" >
89.482 90.0 95.0 100.0 105.0 110.0 111.476 112.951 114.427 115.0 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 193.697 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 359.834 360.0 365.0 370.0 375.0 380.0 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.293 2.949 3.297 3.408 3.285 3.285 3.408 3.43 3.624 3.818 4.006 4.182 4.341 4.486 4.618 4.741 4.856 4.965 5.072 5.176 5.281 5.39 5.506 5.573 5.62 5.803 5.993 6.19 6.393 6.602 6.815 7.031 7.247 7.462 7.675 7.886 8.093 8.295 8.494 8.689 8.88 9.067 9.251 9.432 9.61 9.786 9.96 10.132 10.303 10.473 10.642 10.81 10.976 11.138 11.293 11.432 11.536 11.575 11.575 11.569 11.553 11.527 11.492 11.448 11.395 11.335 11.267 11.192 11.111 11.023 10.93 10.832 10.728 10.621 10.509 10.394 10.275 10.153 10.029 9.902 9.773 9.642 9.51 9.377 9.242 9.107 8.971 8.834 8.697 8.561 8.424 8.288 8.152 8.016 7.881 7.747 7.614 7.481 7.35 7.22 7.091 6.963 6.837 6.711 6.588 6.465 6.345 6.226 6.108 5.992 5.877 5.764 5.653 5.544 5.436 5.329 5.225 5.122 5.02 4.921 4.823 4.727 4.632 4.539 4.447 4.358 4.269 4.183 4.098 4.014 3.932 3.852 3.773 3.695 3.619 3.544 3.471 3.399 3.329 3.26 3.192 3.126 3.061 2.997 2.934 2.873 2.813 2.754 2.696 2.64 2.585 2.53 2.477 2.425 2.374 2.324 2.275 2.227 2.18 2.134 2.089 2.045 2.001 1.959 1.918 1.877 1.837 1.798 1.76 1.723 1.686 1.65 1.615 1.581 1.548 1.515 1.482 1.451 1.42 1.39 1.36 1.331 1.303 1.275 1.248 1.221 1.195

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="3" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.408" PeakHeight="110.0" Num="3" Error="0.0">
-30.512 13.17 -3.176
</ShiftedChebyshev>
<ShiftedChebyshev Region="F1" StartFrequency="3.408" EndFrequency="5.573" PeakHeight="193.697" Num="5" Error="0.0">
-62.453 -26.454 13.424 -4.516 0.729
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="5.573" EndFrequency="11.575" PeakHeight="359.834" Num="5" zHalfNm="257.26" Error="5.556">
-134.982 -42.485 16.168 -5.633 0.795
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="4.427" Depth="0.123"/>
<TopsideChapman PeakHeight="359.834" PeakDensity="1662290.6" PeakScaleHeight="72.264" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
