<?xml version="1.0"?>
<SAORecordList>
<SAORecord
FormatVersion="5.0"
StartTimeUTC="2026-03-14 -073 13:30:00.000"
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 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" >
2026.03.14 (073) 13:30:00</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">
FF202607303141330009039031101000005018000000001107501000080502560000000040000
</DigisondePreface>
</SystemInfo>
<CharacteristicList Num="28" >
<URSI ID="00" Val="11.700" Name="foF2" Units="MHz" QL="/" DL="/" />
<URSI ID="03" Val="2.470" Name="M(D)" QL="/" DL="/" />
<URSI ID="07" Val="28.899" Name="MUF(D)" Units="MHz" QL="/" DL="/" />
<URSI ID="42" Val="3.400" Name="fmin" Units="MHz" QL="/" DL="/" />
<URSI ID="80" Val="4.450" Name="fminF" Units="MHz" QL="/" DL="/" />
<URSI ID="81" Val="3.400" Name="fminE" Units="MHz" QL="/" DL="/" />
<URSI ID="20" Val="3.460" Name="foE" Units="MHz" QL="/" DL="/" />
<URSI ID="51" Val="12.000" Name="fxI" Units="MHz" QL="/" DL="/" />
<URSI ID="16" Val="220.000" Name="h`F" Units="km" QL="/" DL="/" />
<URSI ID="04" Val="220.000" Name="h`F2" Units="km" QL="/" DL="/" />
<URSI ID="24" Val="115.566" Name="h`E" 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="0.350" Name="FF" Units="MHz" QL="/" DL="/" />
<URSI ID="88" Val="11.200" Name="fMUF" Units="MHz" QL="/" DL="/" />
<URSI ID="89" Val="535.000" Name="h`(fMUF)" Units="km" QL="/" DL="/" />
<Modeled Name="foEp" Val="3.309" Units="MHz" ModelName="CCIR-79" />
<URSI ID="61" Val="4.450" Name="f(h`F)" Units="MHz" QL="/" DL="/" />
<URSI ID="60" Val="4.450" Name="f(h`F2)" Units="MHz" QL="/" DL="/" />
<Modeled Name="foF1p" Val="4.323" Units="MHz" ModelName="IRI-90" />
<URSI ID="92" Val="380.460" Name="hmF2" Units="km" QL="/" DL="/" />
<URSI ID="93" Val="274.421" Name="zhalfNm" Units="km" QL="/" DL="/" />
<Modeled Name="foF2p" Val="7.466" Units="MHz" ModelName="URSI-88" ModelOptions="NoStorm" />
<URSI ID="94" Val="136.458" Name="yF2" Units="km" QL="/" DL="/" />
<URSI ID="71" Val="57.399" Name="TEC" Units="TECU" QL="/" DL="/" />
<URSI ID="09" Val="76.504" Name="scale F2" Units="km" QL="/" DL="/" />
<URSI ID="D0" Val="182.390" Name="B0" Units="km" QL="/" DL="/" />
<URSI ID="D1" Val="1.190" 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" >
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
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
220.000 225.000 230.000 235.000 240.000 245.000 250.000 255.000 260.000 265.000 270.000 274.000 278.000 282.000 286.000 290.000 295.000 295.000 300.000 300.000 305.000 305.000 305.000 315.000 316.250 317.500 318.750 320.000 320.000 325.000 325.000 325.000 327.500 330.000 332.500 335.000 335.000 335.000 340.000 340.000 340.000 340.000 345.000 345.000 350.000 350.000 352.500 355.000 355.000 355.000 360.000 360.000 360.000 360.000 365.000 365.000 367.500 370.000 375.000 375.000 375.000 375.000 380.000 380.000 382.500 385.000 390.000 390.000 390.000 390.000 395.000 395.000 400.000 400.000 400.000 405.000 405.000 410.000 410.000 415.000 415.000 420.000 420.000 425.000 425.000 430.000 430.000 430.000 430.000 435.000 440.000 445.000 445.000 445.000 447.500 450.000 450.000 450.000 455.000 455.000 455.000 460.000 465.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 475.000 480.000 480.000 480.000 480.000 485.000 485.000 488.000 491.000 494.000 497.000 500.000 500.000 505.000 507.500 510.000 510.000 514.000 518.000 522.000 526.000 530.000 530.000 532.500 535.000 540.000 545.344 551.332 558.085 565.761 574.564 584.760 596.710 610.907 628.053
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
48 45 0 45 0 45 0 0 0 48 48 0 0 48 0 48 45 51 48 51 54 0 48 48 0 0 0 60 60 57 57 57 0 60 0 54 0 57 57 0 60 60 63 63 60 66 0 63 66 66 63 66 66 66 66 69 0 66 57 63 66 66 63 66 57 63 51 57 66 66 63 66 60 63 66 66 69 66 66 63 66 60 63 60 66 60 66 66 63 51 63 57 57 63 60 66 66 51 63 60 60 45 60 48 51 48 48 0 48 57 57 54 54 51 0 54 54 57 0 48 0 0 42 45 45 0 45 42 0 0 0 0 51 54 0 54 0 51 48 45 45 0 42 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 1.171875 -0.390625 1.953125 -2.734375 0.390625 -0.390625 -0.390625 2.734375 -2.734375 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 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -0.390625 -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 -1.171875 -0.390625 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -0.390625 -1.171875 -1.171875 -1.171875 -1.171875 0.390625 -1.171875 -1.171875 2.734375 -0.390625 1.953125 0.390625 -1.171875 -1.171875 -1.953125 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -1.171875 -2.734375 -1.171875 -1.171875 -1.953125 -1.171875
</TraceValueList>
</Trace>
<Trace Type="standard" Layer="E" Polarization="O" Num="2">
<FrequencyList Type="float" Units="MHz" Description="Nominal Frequency" >
3.4 3.45
</FrequencyList>
<RangeList Type="float" Units="km" Description="Group Range" >
115.566 119.320
</RangeList>
<TraceValueList Name="Amplitude" Type="integer" Units="dB" NoValue="0" Description="Relative Amplitude" >
51 0
</TraceValueList>
<TraceValueList Name="DopplerShift" Type="float" Units="Hz" NoValue="99.0" Description="Doppler Frequency Shift" >
0.390625 -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" >
89.473 90.0 95.0 100.0 105.0 110.0 111.883 113.767 115.0 115.65 120.0 125.0 130.0 135.0 140.0 145.0 150.0 155.0 160.0 165.0 170.0 175.0 180.0 185.0 190.0 195.0 200.0 205.0 210.0 215.0 220.0 225.0 230.0 235.0 240.0 245.0 250.0 255.0 260.0 265.0 270.0 275.0 280.0 285.0 290.0 295.0 300.0 305.0 310.0 315.0 320.0 325.0 330.0 335.0 340.0 345.0 350.0 355.0 360.0 365.0 370.0 375.0 380.0 380.46 385.0 390.0 395.0 400.0 405.0 410.0 415.0 420.0 425.0 430.0 435.0 440.0 445.0 450.0 455.0 460.0 465.0 470.0 475.0 480.0 485.0 490.0 495.0 500.0 505.0 510.0 515.0 520.0 525.0 530.0 535.0 540.0 545.0 550.0 555.0 560.0 565.0 570.0 575.0 580.0 585.0 590.0 595.0 600.0 605.0 610.0 615.0 620.0 625.0 630.0 635.0 640.0 645.0 650.0 655.0 660.0 665.0 670.0 675.0 680.0 685.0 690.0 695.0 700.0 705.0 710.0 715.0 720.0 725.0 730.0 735.0 740.0 745.0 750.0 755.0 760.0 765.0 770.0 775.0 780.0 785.0 790.0 795.0 800.0 805.0 810.0 815.0 820.0 825.0 830.0 835.0 840.0 845.0 850.0 855.0 860.0 865.0 870.0 875.0 880.0 885.0 890.0 895.0 900.0 905.0 910.0 915.0 920.0 925.0 930.0 935.0 940.0 945.0 950.0 955.0 960.0 965.0 970.0 975.0 980.0 985.0 990.0 995.0 1000.0
</AltitudeList>
<ProfileValueList Name="PlasmaFrequency" Type="float" Units="MHz" Description="Plasma frequency" >
0.2 0.241 2.328 2.994 3.347 3.46 3.332 3.332 3.416 3.46 3.567 3.691 3.815 3.94 4.066 4.194 4.324 4.457 4.591 4.729 4.868 5.011 5.156 5.304 5.454 5.606 5.761 5.919 6.078 6.24 6.403 6.568 6.735 6.904 7.074 7.245 7.417 7.59 7.765 7.94 8.116 8.294 8.472 8.651 8.831 9.011 9.192 9.374 9.557 9.74 9.924 10.108 10.292 10.476 10.658 10.838 11.013 11.182 11.339 11.479 11.593 11.669 11.7 11.7 11.696 11.683 11.66 11.629 11.59 11.544 11.489 11.428 11.361 11.287 11.207 11.122 11.033 10.938 10.839 10.736 10.63 10.52 10.407 10.291 10.173 10.052 9.93 9.806 9.68 9.554 9.426 9.297 9.168 9.038 8.907 8.777 8.646 8.516 8.385 8.255 8.126 7.997 7.869 7.741 7.615 7.489 7.364 7.24 7.117 6.996 6.875 6.756 6.638 6.522 6.407 6.293 6.181 6.07 5.96 5.852 5.745 5.64 5.537 5.435 5.334 5.235 5.137 5.041 4.946 4.853 4.762 4.671 4.583 4.495 4.41 4.325 4.242 4.161 4.081 4.002 3.924 3.848 3.774 3.7 3.628 3.558 3.488 3.42 3.353 3.287 3.223 3.159 3.097 3.036 2.976 2.918 2.86 2.803 2.748 2.694 2.64 2.588 2.536 2.486 2.436 2.388 2.34 2.294 2.248 2.203 2.159 2.116 2.074 2.032 1.992 1.952 1.913 1.875 1.837 1.8 1.764 1.729 1.694 1.66 1.627 1.594 1.562 1.531

</ProfileValueList>
</Tabulated>
<ShiftedChebyshevList Num="2" >
<ShiftedChebyshev Region="E" StartFrequency="0.2" EndFrequency="3.46" PeakHeight="110.0" Num="3" Error="0.0">
-30.548 13.223 -3.202
</ShiftedChebyshev>
<ShiftedChebyshev Region="F2" StartFrequency="3.46" EndFrequency="11.7" PeakHeight="380.46" Num="5" zHalfNm="274.421" Error="4.23">
-211.138 -68.649 18.889 -5.26 1.348
</ShiftedChebyshev>
</ShiftedChebyshevList>
<ProfileValley Model="ULCAR" Width="5.65" Depth="0.128"/>
<TopsideChapman PeakHeight="380.46" PeakDensity="1698387.1" PeakScaleHeight="76.504" />
</Profile>
</ProfileList>
</SAORecord>
</SAORecordList>
